GV3-20SP0M1ARemote air quality sensor

ACCO Brands, Inc. Agent Authorization Company: ACCO Brands, Inc. Address: 1500 Fashion Island Blvd., 3rd Floor, San Mateo, CA, United States Product Name: Remote air quality sensor Model Number(s): SensorPod-M Product Description: Remote air quality sensor We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Benjamin Hsu Date: 2021.09.22 Name: Title: Compliance Manager Company: ACCO Brands, Inc.

Date:13September2021 ACCOBrands,Inc. To: FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 ToWhomItMayConcern: The ACCO Brands, Inc., the undersigned,hereby authorizes Mr. Wu Xuewen from Shenzhen BALUN Technology Co., Ltd., to act on the behalf of the ACCO Brands, Inc. solely in matters relating to the application for an FCC equipment authorization for FCC ID:GV3‐20SP0M1A including the signing of documents in connection with this Application. Necessary acts carried outbyShenzhenBALUNTechnologyCo.,Ltd.inconnectionwiththeApplicationshallhavethe sameeffectasactsoftheACCOBrands,Inc.. TheACCOBrands,Inc.alsoherebycertifythatnopartytothisapplicationissubjecttoadenial ofbenefits,includingFCCbenefits,pursuanttoSection5301oftheAnti‐DrugAbuseActof1988, 21U.S.C.Section862. YoursSincerely, BenjaminHsu

ACCO Brands, Inc. 1500 Fashion Island Blvd., 3rd Floor, San Mateo, California 94404, USA Date: 9 September 2021 ACCO Brands, Inc. To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 Re: ACCO Brands, Inc. FCC ID: GV3-20SP0M1A FCC Certification Confidentiality Request Gentlemen: This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. ACCO Brands, Inc. requests that the following documents regarding this submission for FCC ID: GV3-20SP0M1A be kept confidential: Exhibit Type File Name Block Diagram Block Diagram.pdf Schematics Schematics.pdf Operational Description Operational Description.pdf And below exhibit kept short-term confidential (180 days): External photos External photos.pdf Test setup photos test photo.pdf Internal photos Internal photos.pdf User manual User manual.pdf Those documents contain detailed system and equipment description and related information about the product which ACCO Brands, Inc. considers to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Since this design is a basis form which future technological products will evolve, ACCO Brands, Inc. considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Yours Sincerely, _____________ Benjamin Hsu Compliance Manager ACCO Brands, Inc.

Annex No.: BL-SZ2180698-AW 1 / 4 EUT EXTERNAL PHOTOS FRONT VIEW OF EUT REAR VIEW OF EUT Annex No.: BL-SZ2180698-AW 2 / 4 LEFT SIDE VIEW OF EUT RIGHT SIDE OF EUT Annex No.: BL-SZ2180698-AW 3 / 4 TOP VIEW OF EUT BOTTOM VIEW OF EUT Annex No.: BL-SZ2180698-AW 4 / 4 Accessory-Power Adapter CLOSE-UP

Annex No.: BL-SZ2180698-AI 1 / 2 EUT INTERNAL PHOTOS EUT UNCOVER VIEW EUT UNCOVER VIEW Annex No.: BL-SZ2180698-AI 2 / 2 MAIN BOARD TOP VIEW MAIN BOARD REAR VIEW RF Chip PCB Antenna

RF Exposure Evaluation for FCC ID: GV3-20SP0M1A Refer user manual this device is a Remote air quality sensor, and this device was designed used in Mobile devices that the minimum distance between human’s body is 20cm. Based on the 47CFR 2.1091, this device belongs to Mobile device. The definition of the category as following: Mobile Derives: CFR Title 47 §2.1091(b) (b) For purposes of this section, a mobile device is defined as a transmitting device designed to be used in other than fixed locations and to generally be used in such a way that a separation distance of at least 20 centimeters is normally maintained between the transmitter’s radiating structure(s) and the body of the user or nearby persons. FCC KDB 447498 D01 General RF Exposure Guidance v06 Limit Devices operating in standalone mobile exposure conditions may contain a single transmitter or multiple transmitters that do not transmit simultaneously. A minimum test separation distance ≥ 20 cm is required between the antenna and radiating structures of the device and nearby persons to apply mobile device exposure limits. The distance must be fully supported by the operating and installation configurations of the transmitter and its antenna(s), according to the source-based time- averaged maximum power requirements of § 2.1091(d)(2). In cases where cable losses or other attenuations are applied to determine compliance, the most conservative operating configurations and exposure conditions must be evaluated. The minimum test separation distance required for a device to comply with mobile exposure conditions must be clearly identified in the installation and operating instructions, for all installation and exposure conditions, to enable users and installers to comply with RF exposure requirements. For mobile devices that have the potential to operate in portable device exposure conditions, similar to the configurations described in § 2.1091(d)(4), a KDB inquiry is required to determine the SAR test requirements for demonstrating compliance. When the categorical exclusion provision of § 2.1091(c) applies, the minimum test separation distance may be estimated, when applicable, by simple calculations according to plane-wave equivalent conditions, to ensure the transmitter and its antenna(s) can operate in manners that meet or exceed the estimated distance. The source-based time-averaged maximum radiated power, according to the maximum antenna gain, must be applied to calculate the field strength and power density required to establish the minimum test separation distance. When the estimated test separation distance becomes overly conservative and does not support compliance, MPE measurement or computational modeling may be used to determine the required minimum separation distance. According to FCC Part 1.1307, systems operating under the provisions of this section shall be operated in a manner the ensures that the public is not exposed to radio frequency energy level in excess of the commission’s guidelines. Limits for General Population/ Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength(E)(V/m) Magnetic Field Strength (H)(A/m) Power Density (S)(mW/cm 2 ) 0.3-1.34 614 1.63 (100)* 1.34-30 824/f 2.19/f (180/f2)* 30-300 27.5 0.073 0.2 300-1500 f/1500 1500-100,000 1.0 MPE calculation formula Where: S = power density P = output power (mW) G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = Separation distance between radiator and human body (cm) Test data 2.4G ISM Band Mode GFSK Low Channel Middle Channel High Channel Peak Power (dBm) -12.50 -12.62 -12.75 Note: This report listed the worst case peak power value, please refer to RF test report for more details. Turn-up power Mode Range (dBm) 2.4G ISM Band (-13.00)- (-12.00) Test result Evolution mode Maximum peak output power (dBm) Antenna Gain (typical) (dBi): Total Power (mw) Distance (cm) Limit of Power Density (mW/cm²) Power Density (mW/cm²) Verdict 2.4G ISM Band -12.00 2.0 0.06 20 1 0.0001 Pass Note: 1. The Remote air quality sensor work frequency range used is 2467 MHz – 2481 MHz, the result close to the limit by the above formula. 2. More power list please refer to RF test report. Conclusion: RF exposure Evaluation Results: Compliance

Report No.: BL-SZ2180698-601 2 / 47 Revision History Version Issue Date Revisions Content Rev. 01 Sep. 22, 2021 Initial Issue Rev. 02 Sep. 26, 2021 Updated Modulation Technology in section 2.5 TABLE OF CONTENTS 1 ADMINISTRATIVE DATA (GENERAL INFORMATION) .......................................................................... 5 1.1 Identification of the Testing Laboratory ....................................................................................... 5 1.2 Identification of the Responsible Testing Location ...................................................................... 5 1.3 Laboratory Condition ................................................................................................................... 5 1.4 Announce .................................................................................................................................... 5 2 PRODUCT INFORMATION ...................................................................................................................... 6 2.1 Applicant Information ................................................................................................................... 6 2.2 Manufacturer Information ............................................................................................................ 6 2.3 Factory Information ..................................................................................................................... 6 2.4 General Description for Equipment under Test (EUT) ................................................................ 6 2.5 Technical Information .................................................................................................................. 7 3 SUMMARY OF TEST RESULTS .............................................................................................................. 8 3.1 Test Standards ............................................................................................................................ 8 3.2 Verdict ......................................................................................................................................... 8 4 GENERAL TEST CONFIGURATIONS ..................................................................................................... 9 4.1 Test Environments ...................................................................................................................... 9 4.2 Test Equipment List ..................................................................................................................... 9 4.3 Description of Test Setup .......................................................................................................... 10 4.3.1 For Antenna Port Test ............................................................................................................... 10 4.3.2 For AC Power Supply Port Test ................................................................................................ 10 4.3.3 For Radiated Test (Below 30 MHz) ........................................................................................... 11 4.3.4 For Radiated Test (30 MHz-1 GHz) .......................................................................................... 11 4.3.5 For Radiated Test (Above 1 GHz) ............................................................................................. 12 4.4 Measurement Results Explanation Example ............................................................................. 13 4.4.1 For conducted test items: .......................................................................................................... 13 4.4.2 For radiated band edges and spurious emission test: ............................................................... 13 Report No.: BL-SZ2180698-601 3 / 47 5 TEST ITEMS ........................................................................................................................................... 14 5.1 Antenna Requirements .............................................................................................................. 14 5.1.1 Relevant Standards ................................................................................................................... 14 5.1.2 Antenna Anti-Replacement Construction .................................................................................. 14 5.1.3 Antenna Gain ............................................................................................................................ 14 5.2 Number of Hopping Frequency ................................................................................................. 15 5.2.1 Limit ........................................................................................................................................... 15 5.2.2 Test Setup ................................................................................................................................. 15 5.2.3 Test Procedure .......................................................................................................................... 15 5.2.4 Test Result ................................................................................................................................ 15 5.3 Peak Output Power ................................................................................................................... 16 5.3.1 Test Limit ................................................................................................................................... 16 5.3.2 Test Setup ................................................................................................................................. 16 5.3.3 Test Procedure .......................................................................................................................... 16 5.3.4 Test Result ................................................................................................................…

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Annex No.: BL-SZ2180698-AR 1 / 5 TEST SETUP PHOTOS 1 Radiated Test Photo Below 30MHz Close-up Annex No.: BL-SZ2180698-AR 2 / 5 30MHz-1GHz Close-up Annex No.: BL-SZ2180698-AR 3 / 5 Above 1GHz Close-up Annex No.: BL-SZ2180698-AR 4 / 5 2 Conducted Test Photo Conducted Test-2.4G 3 Conducted Emissions Test Photo 1 Annex No.: BL-SZ2180698-AR 5 / 5 Test Photo 2