2BSPK-YTM-015.0 controller

Shenzhen Interm Electronic Technology Co., Ltd. 1.Power On/Off Button: Press this button to turn on or off the control system after connecting the power supply. 2.Start/Stop Button: In the power-on state, press this button to start or stop heating. The panel indicator light will go out when heating stops and stay on when heating continues. 3. Color Light Button: In the power-connected state, press this button to turn on the color lights; press again to turn them off. Long press the color light button to enter the color switching mode. The panel will display 2n: 1. White 2. Purple 3. Blue 4. Cyan 5. Green 6. Yellow 7. Red 8. Orange 9. Pink 10. Gradient/Cycle (starts from the first color). It will automatically exit this function if there is no operation for 15 seconds. 1、Panel Operation Instructions 4. Eaves Light Button: In the power-connected state, press this button to turn on the eaves light; press again to turn it off. (Eaves Light: i.e., Lighting Lamp) . 5. Time +/- Buttons: In the power-on state, press the "+" or "-" button once to adjust the set heating time to the desired duration, with a step of 1 minute. 6. Temperature +/- Buttons: In the power-on state, press the "+" or "-" button once to adjust the set temperature to the desired value, with a step of 1°C. 7. C/F Button: In the working state, press this button to switch between Celsius (°C) and Fahrenheit (°F) units. 2、Bluetooth Function Operation Instructions In the power-on state or when any light is on, turn on the Bluetooth function on your mobile phone to search for and connect to this product's Bluetooth device (device name: BT-Sauna). Once the mobile phone shows "Connected", you can play your favorite music.。 3、Control box size approximately: 308*200*50MM (Unit: MM) Input Voltage: AC 100-240V/50-60Hz 4、The ports of the control box are distributed on the side of the housing, and each port position has corresponding printed markings. Explanation of each port: [schematic diagram] 50MM 308MM 200MM FUSE AC POWER PANEL CONTROL Circuit Breaker AC power cord input 12V reserved reading light Eave light refers to a 12V illumination lamp Panel data communication port Two sets of DC12V output HEATER Heating film output AC communication output Heating indicator light Speaker Output AUX IN audio input Side view [Figure 1] Side view [Figure 2] Side view [Figure 3] R+ R- L+ L- HI Lamp panel Lamp-12V 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. NOTE 1: 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. NOTE 2: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. RF Exposure Statement To maintain compliance with FCC'S RF Exposure guidelines, This equipment should be installed and operated with minimum 20cm between the radiator and your body. This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter.

Shenzhen Interm Electronic Technology Co., Ltd. U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: November 19, 2025 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BSPK-YTM-01 Shenzhen Interm Electronic Technology 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 Company Name: Shenzhen Interm Electronic Technology Co., Ltd. FRN: 0037591062 Address: 5th Floor, Building B, Zone D, Huayi Industrial Park, Dalang Subdistrict, Longhua New District, Shenzhen, China Signature: Contact Person: Tong Wei Tel: +86-18928486196 Email: [email protected]

Rev 1/26/2023 Shenzhen Interm Electronic Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 11-19-2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BSPK-YTM-01 [Shenzhen Interm Electronic Technology Co., Ltd.] 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. [Shenzhen Interm Electronic Technology Co., Ltd.] 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). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) (Applicant printed name) Tong Wei Rev 1/26/2023 Shenzhen Interm Electronic Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 11-19-2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BSPK-YTM-01 [Shenzhen Interm Electronic Technology Co., Ltd.] 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. Sincerely, (Applicant signature) (Applicant printed name) Tong Wei

Length * Width (18mm * 7.2mm) Manufacturer：Shenzhen Interm Electronic Technology Co., Ltd. Address：5th Floor, Building B, Zone D, Huayi Industrial Park, Dalang Subdistrict, Longhua New District, Shenzhen, China

Shenzhen Interm Electronic Technology Co., Ltd. Date: November 19, 2025 Product Model Number: YTM-01 FCC ID: 2BSPK-YTM-01 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Tong Wei Contact Listed on FCC Wesbite Title: Registered Engineer Email: [email protected] Telephone: +86-18928486196 On behalf of: Shenzhen Interm Electronic Technology Co., Ltd.

Shenzhen Interm Electronic Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: November 19, 2025 Subject; Request for Confidentiality FCC ID: 2BSPK-YTM-01 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Tong Wei Title: Manager

Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 1 of 9 Annex A. EUT External Photos Model: YTM-01 EUT View 1 EUT View 2 Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 2 of 9 EUT View 3 EUT View 4 Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 3 of 9 EUT View 5 EUT View 6 Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 4 of 9 EUT View 7

Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 10 of 9 Annex D. Label and Inf ormation FCC Label Sample FCC Labe Size: 4cm * 2cm 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 Label Location

Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 5 of 9 Annex B. EUT Internal Photos Model: YTM-01 EUT Internal View 1 EUT Internal View 2 PCB ANT Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 6 of 9 EUT Internal View 3 EUT Internal View 4 Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 7 of 9 EUT Internal View 5

FCC ID: 2BSPK-YTM-01 RF Exposure Evaluation Limits The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposures 0.3–3.0 614 1.63 *(100) 6 3.0–30 1842/f 4.89/f *(900/f 2 ) 6 30–300 61.4 0.163 1.0 6 300–1500 f/300 6 1500–100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f 2 ) 30 30–300 27.5 0.073 0.2 30 300–1500 f/1500 30 1500–100,000 1.0 30 f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r 2 ) Where Pd = power density in mW/cm 2 , Pout = output power to antenna in mW; G = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. Test Result of RF Exposure Evaluation BR+EDR Mode Output power to antenna (dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Output power to antenna (mW) Power Density at R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result 8DPSK 2.19 2(±1) 3 1.995 0.0006 1.0 PASS Remark: antenna gain= 1.7dBi

Report No: DSP25110098-1E FCC Test Report Page 1 of 51 FCC TEST REPORT FCC ID: 2BSPK-YTM-01 Report No. : DSP25110098-1E Applicant : Shenzhen Interm Electronic Technology Co., Ltd. Product Name : 5.0 controller Model Name : YTM-01 Test Standard : FCC Part 15.247 Date of Issue : 2025-11-21 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: DSP25110098-1E FCC Test Report Page 2 of 51 Test Report Basic Information Applicant..................................: Shenzhen Interm Electronic Technology Co., Ltd. Address of Applicant...............: 5th Floor, Building B, Zone D, Huayi Industrial Park, Dalang Subdistrict, Longhua New District, Shenzhen, China Manufacturer..........................: Shenzhen Interm Electronic Technology Co., Ltd. Address of Manufacturer........: 5th Floor, Building B, Zone D, Huayi Industrial Park, Dalang Subdistrict, Longhua New District, Shenzhen, China Product Name.........................: 5.0 controller Brand Name.............................: - Main Model..............................: YTM-01 Series Models..........................: - Test Standard..........................: FCC Part 15 Subpart C ANSI C63.4-2014 ANSI C63.10-2020/Cor 1-2023 Date of Test .............................: 2025-11-05 to 2025-11-21 Test Result...............................: PASS Tested By ................................: (Walker Wu) 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: DSP25110098-1E 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 ............................................................................................................................................... 11 3.1 Standard and Limit.............................................................................................................................................. 11 3.2 Test Result .......................................................................................................................................................... 11 4. Conducted Emissions ................................................................................................................................................ 12 4.1 Standard and Limit.............................................................................................................................................. 12 4.2 Test Procedure.................................................................................................................................................... 12 4.3 Test Data and Results .......................................................................................................................................... 13 5. Radiated Emissions ................................................................................................................................................... 16 5.1 Standard and Limit.............................................................................................................................................. 16 5.2 Test Procedure.................................................................................................................................................... 16 5.3 Test Data and Results .......................................................................................................................................... 18 6. Band-edge Emissions(Radiated) ............................................................................................................................... 22 6.1 Standard and Limit.............................................................................................................................................. 22 6.2 Test Procedure.................................................................................................................................................... 22 6.3 Test Data and Results ....................................................................................................................…

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Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 8 of 9 Annex C. Test Photos Conducted Emission Test View 1 Radiated Emission Test View Below 1GHz Report No: DSP25110098-1E FCC ID: 2BSPK-YTM-01 Annex of Test Report Page 9 of 9 Radiated Emission Test View Above 1GHz