2BM2S-CRY2833Sound Level Meters

CRY2833&CRY2834 SoundLevelMeters UserManual 2 WarrantyStatement Weproudlyofferatwo-yearwarrantyontheCRY2833& CRY2834SoundLevelMeters,ensuringitmeetsthehighest standardsofqualityandperformance.Thiswarrantycovers defectsinmaterialsandworkmanshipundernormaluse. CoverageDetails: •WarrantyPeriod:Twoyearsfromthedateofpurchase. •What’sCovered:Defectsinmaterialsorworkmanshipthat occurundernormaluse. •What’sNotCovered:Damagecausedbymisuse, unauthorizedmodifications,accidents,orexternalfactors. Torequestawarrantyservice,pleasecontactourcustomer supportteamwithyourproofofpurchase.Wewillrepairor replacethedeviceatourdiscretion. 3 ContactUs HangzhouHeadquarters Tel:+86-571-88225128 E-mail:[email protected] Add:No.10XianqiaoRd,YuhangDist,Hangzhou,China Web:www.crysound.com U.S.Office​ Add:515SFryRd,SuiteA-221,Katy,TX77450,USA Tel:+1-877-215-7752 4 SafetyUseInstructions Topreventpossiblefireorpersonalinjury: Pleasereadthecontentsofthissafetynoticecarefullybeforeusingthe product. Usetheproductonlyforitsintendedpurpose. Unauthorizedopeningoftheunitwillvoidthewarranty.Contact CRYSOUNDformoreinformation. Stopusingthedeviceifitmalfunctionsorheatsupabnormally. Pleasecontactthemanufacturerforequipmentrepairwork. Donotstoretheequipmentnearheatsources,flamesorinahot environment. Ifthestoragetimeislongerthan1month,pleasestoretheproductat anambienttemperatureoflessthan40°C/140°F. 5 FCC Warning This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 6 FCC WARNING This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End user must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. The mobile device is designed to meet the requirements for exposure to radio waves established by the Federal Communications Commission (USA). These requirements set a SAR limit of 1.6 W/kg averaged over one gram of tissue. The highest SAR value reported under this standard during product certification for use when properly worn on the body is 0.204W/kg. For body operation, this device has been tested and meets FCC RF exposure guidelines when used with any accessory that contains no metal and that positions a minimum of 0mm from the body. Use of other accessories may not ensure compliance with FCC RF exposure guidelines. 7 Catalog 1Introduction..................................................................................................................10 1.1AboutThisManual.........................................................................................10 1.2AbouttheCRY2833&CRY2834...............................................................10 2TechnicalSpecifications...........................................................................................11 3InstructionsForUse..................................................................................................13 3.1IconandInterfaceIllustration....................................................................13 3.2Preparations.....................................................................................................14 3.3PowerOn..........................................................................................................15 3.4Settings..............................................................................................................15 3.4.1WiFi.........................................................................................................16 3.4.2Bluetooth®............................................................................................16 3.4.3AnalogOutput....................................................................................17 3.4.4DisplaySettings..................................................................................19 3.4.5Storage..................................................................................................19 3.4.6Date&Time.........................................................................................19 3.4.7Language..............................................................................................20 3.4.8About......................................................................................................20 3.5Calibration........................................................................................................22 3.6MeasurementParameters...........................................................................23 3.7UseoftheTe…

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Hangzhou Crysound Electronics Co.,Ltd. Covered Equipment Certification Attestation Letter 4/17/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BM2S-CRY2833 Hangzhou Crysound Electronics Co.,Ltd. (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Hangzhou Crysound Electronics Co.,Ltd. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Hangzhou Crysound Electronics Co.,Ltd. (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Signed: Printed name: Kathy Zeng Title: Manager Company Name: Hangzhou Crysound Electronics Co.,Ltd. Date: 4/17/2026

Hangzhou Crysound Electronics Co.,Ltd. U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: April 17, 2026 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BM2S-CRY2833 Hangzhou Crysound Electronics Co.,Ltd.(“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Hangzhou Crysound Electronics Co.,Ltd. FRN: 0036436822 Address: NO.10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou, China Signature: Contact Person: Kathy Zeng Tel: +8618529516596 Email: [email protected]

DATE: April 17, 2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen CCUT Quality Technology Co., Ltd. (1F, Building 35, Changxing Technology Indstrl Park Changzhen Community, Yutang Street,Shenzhen,China) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with Hangzhou Crysound Electronics Co.,Ltd. (NO.10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou, China). <Signature> Name: Kathy Zeng Title: Manager Applicant Company: Hangzhou Crysound Electronics Co.,Ltd.

Date: April 17, 2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). Sincerely, <Signature> Name: Kathy Zeng Title: Manager Company: Hangzhou Crysound Electronics Co.,Ltd.

DATE: April 17, 2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BM2S-CRY2833 Product Name: Sound Level Meters Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission’s rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...)  Schematics  Block diagram  Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature> Name: Kathy Zeng Title: Manager Company: Hangzhou Crysound Electronics Co.,Ltd.

Hangzhou Crysound Electronics Co.,Ltd. NO.10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou, China Model Difference Statement DATE: April 17, 2026 Product Model Number: CRY2833 FCC ID: 2BM2S-CRY2833 Dear Sir/Madam, Added models Y2832-1, CRY2832-2, CRY2834 basis of the original product CRY2833 The color of appearance and model name of series models listed are different from the main model, but the circuit and the electronic construction are the same, declared by the manufacturer. Sincerely, Name: Kathy Zeng Title: Manager Company name: Hangzhou Crysound Electronics Co.,Ltd. Address: NO.10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou, China

Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report Annex A. EUT External Photos Model : CRY2833 EUT View 1 EUT View 2 Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report EUT View 3 EUT View 4 Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report EUT View 5 EUT View 6 Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report EUT View 7 EUT View 8

Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report Annex D. Label and Inf ormation FCC Label Sample Label Size: 3cm*1.5cm FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report Annex B. EUT Internal Photos EUT Internal View 1 EUT Internal View 2 Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report EUT Internal View 3 EUT Internal View 4 FPCB ANT Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report EUT Internal View 5 EUT Internal View 6 Report No: DSP26031075-1&2E FCC ID: 2BM2S-CRY2833 Annex of Test Report EUT Internal View 7 EUT Internal View 8

Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Page 1 of 40 TEST REPORT Reference No. .................... : WTX26X03081533W FCC ID ................................ : 2BM2S-CRY2833 Applicant ........................... : Hangzhou Crysound Electronics Co.,Ltd. Address.............................. : NO.10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou, China Manufacturer ..................... The same as Applicant Address.............................. The same as Applicant Product Name ................... : Sound Level Meters Model No.. .......................... : CRY2833 Standards .......................... : FCC Part 2.1093, IEEE Std C95.1: 2019 IEEE C95.3: 2021 Date of Receipt sample .... : 2026-03-30 Date of Test........................ : 2026-03-30 to 2026-03-31 Date of Issue ..................... : 2026-04-03 Test Report Form No. ....... : WTX_Part2_1093W Test Result ......................... : Pass Remarks: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of approver. Prepared By: Waltek Testing Group (Shenzhen) Co., Ltd. Address: 1/F., Room 101, Building 1, Hongwei Industrial Park, Liuxian 2nd Road, Block 70 Bao'an District, Shenzhen, Guangdong, China Tel.: +86-755-33663308 Fax.: +86-755-33663309 Email: [email protected] Tested by: Approved by: Lily Yang /Project Engineer Jason Su/Manager Reference No.: WTF20X06039746W Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Page 2 of 40 TABLE OF CONTENTS 1. General Information ...................................................................................................................................................4 1.1 Product Description for Equipment Under Test (EUT) .........................................................................................4 1.2 Test Standards ....................................................................................................................................................6 1.3 Test Methodology ................................................................................................................................................6 1.4 Test Facility .........................................................................................................................................................6 2. Summary of Test Results ..........................................................................................................................................7 3. Specific Absorption Rate (SAR) ................................................................................................................................8 3.1 Introduction ..........................................................................................................................................................8 3.2 SAR Definition .....................................................................................................................................................8 4. SAR Measurement System ........................................................................................................................................9 4.1 The Measurement System ..................................................................................................................................9 4.2 Probe ...................................................................................................................................................................9 4.3 Probe Calibration Process ................................................................................................................................. 11 4.4 Phantom ............................................................................................................................................................ 11 4.5 Device Holder .................................................................................................................................................... 12 4.6 Test Equipment List ........................................................................................................................................... 13 5. Tissue Simulating Liquids ....................................................................................................................................... 14 5.1 Composition of Tissue Simulating Liquid ........................................................................................................... 14 5.2 Tissue Dielectric Parameters for Head and Body Phantoms ............................................................................. 15 5.3 Tissue Calibration Result ................................................................................................................................... 16 6. SAR Measurement Evaluation ................................................................................................................................ 17 6.1 Purpose of System Performance Check ............................................................................................................ 17 6.2 System Setup .................................................................................................................................................... 17 6.3 Validation Results .............................................................................................................................................. 18 7. EUT Testing Position ............................................................................................................................................... 19 7.1 Body Position .................................................................................................................................................... 19 7.2 EUT Ant…

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Page: 1/10 Ref : ACR.193.11.24.BES.A WALTEK TESTING GROUP (SHENZHEN) CO., LTD 1/F., ROOM 101, BUILDING 1, HONGWEI INDUSTRIAL PARK, LIUXIAN 2ND ROAD, BLOCK 70 BAO'AN DISTRICT, SHENZHEN, GUANGDONG, 518101 CHINA MVG COMOSAR DOSIMETRIC E-FIELD PROBE SERIAL NO.: 3823-EPGO-435 Calibrated at MVG Z.I. de la pointe du diable Technopôle Brest Iroise – 295 avenue Alexis de Rochon 29280 PLOUZANE - FRANCE Calibration date: 01/09 /2026 Accreditations #2-6789 Scope available on www.cofrac.fr The use of the Cofrac brand and the accreditation references is prohibited from any reproduction. Summary: This document presents the method and results from an accredited COMOSAR Dosimetric E-Field Probe calibration performed at MVG, using the CALIPROBE test bench, for use with a MVG COMO SAR system only. The test results covered by accreditation are traceable to the International System of Units (SI). COMOSAR E-Field Probe Calibration Report 


         9 COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref : ACR.193.11.24.BES.A Page: 2/10 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. Name Function Date Signature Prepared by : Pedro Ruiz 1/09/2026 Checked & approved by: Technical Manager 1/09/2026 Authorized by: Geraldine Toutain Customer Name Distribution : WALTEK TESTING GROUP (SHENZHEN) CO., LTD Issue Name Date Modifications A 1/09/2026 Initial release Technical Manager Quality Manager Pedro Ruiz 1
09
6 Pedro Ruiz COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref : ACR.193.11.24.BES.A Page: 3/10 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. TABLE OF CONTENTS 1 Device Under Test ..................................................................................................... 4 2 Product Description ................................................................................................... 4 2.1 General Information _______________________________________________________ 4 3 Measurement Method ................................................................................................ 4 3.1 Sensitivity _______________________________________________________________ 4 3.2 Linearity ________________________________________________________________ 5 3.3 Isotropy _________________________________________________________________ 5 3.4 Boundary Effect __________________________________________________________ 5 3.5 Probe Modulation Response _________________________________________________ 6 4 Measurement Uncertainty .......................................................................................... 6 5 Calibration Results ..................................................................................................... 6 5.1 Calibration in air __________________________________________________________ 6 5.2 Calibration in liquid _______________________________________________________ 7 6 Verification Results ................................................................................................... 8 7 List of Equipment ...................................................................................................... 9 COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref : ACR.193.11.24.BES.A Page: 4/ 10 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. 1 DEVICE UNDER TEST Device Under Test Device Type COMOSAR DOSIMETRIC E FIELD PROBE Manufacturer MVG Model SSE2 Serial Number 3823-EPGO-435 Product Condition (new / used) New Frequency Range of Probe 0.15 GHz-7.5GHz Resistance of Three Dipoles at Connector Dipole 1: R1=0.189 M: Dipole 2: R2= 0.212 M: Dipole 3: R3=0.216 M: 2 PRODUCT DESCRIPTION 2.1 GENERAL INFORMATION MVG’s COMOSAR E field Probes are built in accordance to the IEC/IEEE 62209-1528 and FCC KDB865664 D01 standards. Figu re 1 – MVG COMOSAR Dosimetric E field Probe Probe Length 330 mm Length of Individual Dipoles 2 mm Maximum external diameter 8 mm Probe Tip External Diameter 2.5 mm Distance between dipoles / probe extremity 1 mm 3 MEASUREMENT METHOD The IEC/IEEE 62209-1528 and FCC KDB865664 D01 standards provide recommended practices for the probe calibrations, including the performance characteristics of interest and methods by which to assess their effect. All calibrations / measurements performed meet the fore-mentioned standards. 3.1 SENSITIVITY The sensitivity factors of the three dipoles were determined using a two step calibration method (air and tissue simulating liquid) using waveguides as outlined in the standards for frequency range 600- 7500MHz and using the calorimeter cell method (transfer method) as outlined in the standards for frequency 150-450 MHz. COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref : ACR.193.11.24.BES.A Page: 5/ 10 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. 3.2 LINEARITY The evaluation of the linearity was done in free space using the waveguide, performing a power sweep to cover the SAR range 0.01W/kg to 100W/kg. 3.3 ISOTROPY The ax…

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Report No: DSP26031075-1E FCC Test Report Page 1 of 51 FCC TEST REPORT FCC ID: 2BM2S-CRY2833 Report No. : DSP26031075-1E Applicant : Hangzhou Crysound Electronics Co.,Ltd. Product Name : Sound Level Meters Model Name : CRY2833 Test Standard : FCC Part 15.247 Date of Issue : 2026-04-07 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. Report No: DSP26031075-1E FCC Test Report Page 2 of 51 Test Report Basic Information Applicant..................................: Hangzhou Crysound Electronics Co.,Ltd. Address of Applicant...............: NO.10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou, China Manufacturer..........................: Hangzhou Crysound Electronics Co.,Ltd. Address of Manufacturer........: NO.10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou, China Product Name.........................: Sound Level Meters Brand Name.............................: - Main Model..............................: CRY2833 Series Models..........................: Y2832-1, CRY2832-2, CRY2834 Test Standard..........................: FCC Part 15 Subpart C ANSI C63.4-2014 ANSI C͸͵.ͳͲ-2020 Date of Test .............................: 2026-03-23 to 2026-04-02 Test Result...............................: PASS Tested By ................................: (Tate Chen) Reviewed By............................: (Lorzix Luo) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. Report No: DSP26031075-1E FCC Test Report Page 3 of 51 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................9 2. Summary of Test Results ........................................................................................................................................... 10 3. Antenna Requirement ...............................................................…

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