2AQ9R-BH831Air conduction wireless earphone

开机：耳机处于关机状态，长按多功能键，保持3秒， LED蓝灯闪亮，提示音： power on; 关机：耳机处于开机状态，长按多功能键，保持5秒， LED红灯闪一下关机，提示音：poweroff; 链接BT：关机状态，长按多功能键3秒，进入配对状态， LED指示灯红蓝灯闪烁，耳机提示音：Pairing;设备（智 能手机、平板电脑等）搜索到BH831，点击连接； 链接成功：耳机成功连接至设备时，LED蓝灯5秒闪一 下，耳机提示音：Connected; 暂停/播放：蓝牙连接音乐播放状态下，单击多功能按键 为暂停，再单击多功能按键为播放； 接听/挂断：来电状态下：单击多功能按键为接听，长按 2秒多功能按键为拒接电话 通话状态下，单击多功能 按键为挂断 下一曲：长按多功能按键1秒. 语音助手/Siri：蓝牙连接状态，双击多功能键进入语音 模式/Siri，再双击退出； 插充电线：插上充电线后，耳机将会自动关机进入充电 状态； 清除配对信息：关机状态长按多功能按键不松手5秒清除 配对，然后进入到配对模式，红蓝灯同时闪烁1秒，然后 进入到配对模式， 充电：使用充电线时，将耳机插入USB电源，充电状态 下，LED指示灯为红色，充电完成时，则为蓝色； Overview of button functionsInstructions on Controls 气传导无线耳机 1.开机/关机/暂停/播放/接电话/挂电话/下一曲/语音助手 2.磁吸充电口 3.LED指示灯 4.通话麦克风 5.通话降噪麦克风 1.Power On/ Power Off/ Pause/ Play/ Answer / Hang Up / Next/ Voice Assistant 2.Magnetic Charging Port 3.LED Indicator 4.Call Microphone 5.Call Noise-cancelling Microphone Power on: When the headphone is off, press and hold multi-function button for 3 seconds with blue LED flickering, reminding tone: power on. Power off: When the headphone is on, press and hold multi-function button for 5 seconds with red LED flickering once, reminding tone: power off. Connect BT: When the headphone is off, press and hold multi-function button for 3 seconds to enter a pairing state, with red and blue LEDs flickering and reminding tone: pairing. After the device (smart phone, tablet computer, etc.) discovers BH831, click it to connect. Connected successfully: When the headphone is successfully connected to the device, blue LED will flicker once every 5 seconds, with reminding tone: Connected Pause/Play: In the Bluetooth music playback state, click the multi-function button to pause, and then click the multi-function button again to play; Answer/Hang up: when there is an incoming call: click the multi-function button to answer, press and hold the multi-function button for 2 seconds to reject the call. During the call, click the multi-function button to hang up Next: press and hold multi-function button for 1 second Voice assistant/Siri: in Bluetooth connection state, double click multi-function button to enter voice mode/Siri, and double click it again to exit; Plug in charging line: upon plugging in the charging line, the headphone will be shut off automatically and enter charging state; Clear pairing information: with headphone shut off, press and hold multi-function button for 5 seconds to clear pairing and enter pairing mode, with red and blue LEDs flickering for 1 second simultaneously. Charging: In case of using charging line for charging, connect the headphone to the USB power. During charging, LED turns red. When charging is complete, the LED turns blue. 20.8g 20.8 Please wear the bone-conduction speakers of the headphone at your cheekbones in front of your ears and do not put them in your ears. Listening to music for an excessive long time may make you feel uncomfortable, please try to use a medium volume instead of a big one. No matter how the volume is, please do not make it prevent you from hearing the surrounding sounds. Please take care when using the headphone. Do not throw, press the headphone or put it in the water. Keep the headphone away from fire, water and high voltage devices. It is not for children's use as it contains small parts. Please do not treat it as domestic waste. Instead, send it to the local electrical and electronic recycling station. If there is any injury or property loss due to violation of the above contents, we will not bear any responsibility. 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. FCC Warning 2 1 4 3 5 2 1 4 3 5

Shenzhen Elenose Technology Co. LTD 2023.04.06 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for 2AQ9R-BH831 [Shenzhen Elenose Technology 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. Sincerely, (Applicant signature) (Applicant printed name): Zhedong He Shenzhen Elenose Technology Co. LTD 2023.04.06 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for 2AQ9R-BH831 [Shenzhen Elenose Technology 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 an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name): Zhedong He

Shenzhen Elenose Technology Co. LTD U.S. Agent Designation for Service of Process (Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA ATTENTION: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Baihetian Innovative Solutions FRN: 0033401605 Contact Name: Kenneth Young Street Address: 6837 Chase Rd City/Province/Zip: Dearborn, MI 48126 Telephone No: 313-395-3113 Email: [email protected] This letter is to confirm that we (“the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: Signed by (Printed Name/Title): The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen Elenose Technology Co. LTD Grantee Code: 2AQ9R Contact Name: Zhedong He Street Address: Room 423, Building 8, Zijing No.1, Huahui Road, Tongsheng Community, Dalang Street, Longhua District, Shenzhen, Guangdong, China. 518107 Telephone No: 13632605005 Email: [email protected] Applicant Signature: Date: 2023-03-31 Signed by (Printed Name/Title): Zhedong He / CEO

Shenzhen Elenose Technology Co. LTD 2023.04.06 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Air conduction wireless earphone Trademark: N/A MODEL: BH831 FCC ID:2AQ9R-BH831 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Zhedong He / CEO Contact information / address: Room 423, Building 8, Zijing No.1, Huahui Road, Tongsheng Community, Dalang Street, Longhua District, Shenzhen, Guangdong, China

Shenzhen Elenose Technology Co. LTD 2023.04.06 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing Co., Ltd 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). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : Zhedong He / CEO Contact information / address: Room 423, Building 8, Zijing No.1, Huahui Road, Tongsheng Community, Dalang Street, Longhua District, Shenzhen, Guangdong, China

External Photos

Label & label location 10mm*5mm FCC ID:2AQ9R-BH831 Label location

Internal Photos Antenna

RF EXPOSURE EVALUATION METHOD FCC ID:2AQ9R-BH831 Applicable standard： In accordance with FCC 47 CFR part 2 (2.1093) this device has been defined as a portable device which is defined as a transmitting device designed to be used so that the radiating structure(s) of the device is/are within 20 centimeters of the body of the user. Portable devices must be evaluated using the specified in FCC 47 CFR part 2 (2.1093) and ANSI/IEEEC95.1-1992. and had been tested in accordance with the measurement methods and procedures specified in IEEE 1528-2003. Per FCC KDB 447498 D01 v06, the 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances s 50 mm are determined by: SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR,where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. BT Modulation Test Channel Output Power (dBm) Limit (dBm) GFSK Low -2.56 21 GFSK Middle -2.76 21 GFSK High -3.68 21 π/4DQPSK Low -1.71 21 π/4DQPSK Middle -1.95 21 π/4DQPSK High -2.85 21 max possible output power (PK,conducted)：-2±1dBm 4.34dBi logarithmic terms convert to numeric result is nearly 2.716 -1dBm=0.79mW 2402MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.79/5*√2.402 =0. 25≤3.0 2441MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.79/5*√2.441 =0. 25≤3.0 2480MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.79/5*√2.48=0. 25≤3.0 Conclusion: 1. [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] * [√f(GHz)] < 3.0. 2. SAR Test Exclusion Thresholds is 3.0 for separation distance 5mm. Therefore, SAR test is not required.

HM3216ANT2450-HM02_V1.0Page 1 of 8 深圳市恒信达通信科技有限公司 Shenzhen HengXinDa Technology Co., Ltd. SPECIFICATION Ceramic Antenna 3216 Size 2400-2500 MHz P/N: HXD-BT5-HM02 Shenzhen HengXinDa Technology Co., Ltd. Address: 301, No.8, Sanhe Huaqiao District 2, Tongsheng Community, Dalang Street, Longhua District, Shenzhen City, China. 深圳市恒信达通信科技有限公司 ShenzhenHengxindaTechnologyCo.,Ltd. HXD-BT5-HM02_V1.0Page 2 of8 ForMiniaturizedBluetoothSystem 3.Dimensions(Unit:mm) 1).OverView: 2).PCBLYOUTVIEW: 1.Frequency 2400-2500MHz 2.Applications 深圳市恒信达通信科技有限公司 ShenzhenHengxindaTechnologyCo.,Ltd. HXD-BT5-HM02_V1.0Page 3 of8 4.EvaluationBoardSizeandMatchingCircuits 5.ElectricalCharacteristics 0.5pF 4.7nH PartNumberHM3216ANT2450-HM02 CentralFrequency2450MHz Bandwidth100(typ.)MHz V.S.W.R≤2.0 PeakGain4.34dBi Impedance50Ohm PolarizationLinear AzimuthBeamwidthOmni-directional 深圳市恒信达通信科技有限公司 Shenzhen Hengxinda Technology Co., Ltd. HXD-BT5-HM02_V1.0Page 4 of 8 6.ReturnLoss(S11) 7.RadiationPattern&Efficiency Frequency (MHz)240024502500 Efficiency (dB)-1.87-1.67-1.94 Efficiency (%)656864 Gain (dBi)3.124.343.45 深圳市恒信达通信科技有限公司 ShenzhenHengxindaTechnologyCo.,Ltd. HXD-BT5-HM02_V1.0Page 5 of8 8.ReflowSolderingStandardCondition 9.PackagingandDimensions PlasticTape 深圳市恒信达通信科技有限公司 ShenzhenHengxindaTechnologyCo.,Ltd. HXD-BT5-HM02_V1.0Page 6 of8 RemarksforPackage Reservealengthof150~200mmforthetrailerofthecarrierand250~300mmfor theleaderofthecarrerandfurther250mmofcovertapeattheleadingpartofthe carrier. Reel(6000pcs/Reel) StoragePeriod OxidizableMaterial,12monthsinvacuumsealedbag,pleaserepackwithin168 hoursbyre-sealthepackagetreatmentafterusing. StorageTemperatureRange:<30degreeC,Humidity:<60%RH 深圳市恒信达通信科技有限公司 ShenzhenHengxindaTechnologyCo.,Ltd. HXD-BT5-HM02_V1.0Page 7 of8 10.DependabilityTest TestitemTestcondition/TestmethodSpecification Solderability IEC60068-2-58 GB/T2423.28 *Solderbathtemperature：240±5°C *Immersiontime：2±0.5sec Solder：Sn96.5Ag3.0Gu0.5for lead-free. Atleast95%ofasurfaceofeach terminalelectrodemustbecovered byfreshsolder. Leaching(Resistance todissolutionof metallization) JISC5101 *Solderbathtemperature：260±5°C *Leachingimmersiontime：10±1sec Solder:Sn96.5Ag3.0Gu0.5for lead-free. Lossofmetallizationontheedgesof eachelectrodeshallnotexceed25%. Resistanceto solderingheat IEC60068-2-58 GB/T2423.28 *Preheatingtemperature：120~150°C,1 minute. *Soldertemperature：260±5°C *Immersiontime：10±1secSolder： Sn96.5Ag3.0Gu0.5forlead-free Measurementtobemadeafterkeeping atroomtemperaturefor24±2hrs. Nomechanicaldamage. Electricalspecificationshallsatisfy thedescriptionsinelectrical characteristicsattheroom temperature. Lossofmetallizationontheedgesof eachelectrodeshallnotexceed25%. DropTest IEC60068-2-32 GB/T2423.8 Customer’s specification. *Height：50cm *TestSurface:Rigidsurfaceofconcreteor steel. *Times：6surfacesforeachunits；2timesfor eachside. Nomechanicaldamage. Electricalspecificationshallsatisfythe descriptionsinelectricalcharacteristicsat theroomtemperature. Vibration IEC60068-2-6 GB/T2423.10 *Frequency：10Hz~55Hz~10Hz(1min) *Totalamplitude：1.5mm *Testtimes：6hrs.(Twohrseachinthree mutuallyperpendiculardirections) Nomechanicaldamage. Electricalspecificationshallsatisfythe descriptionsinelectricalcharacteristicsat theroomtemperature. AdhesiveStrengthof Termination IEC60068-2-21 GB/T2423.6 *Pressurizingforce： 5N(≦0603)；10N(>0603) *Testtime:10±1sec Noremarkabledamageorremovalofthe termination. 深圳市恒信达通信科技有限公司 ShenzhenHengxindaTechnologyCo.,Ltd. HXD-BT5-HM02_V1.0Page 8 of8 Bendingtest IEC60068-2-21 GB/T2423.29 Themiddlepartofsubstrateshallbe pressurizedbymeansofthepressurizingrod atarateofabout1mm/sperseconduntilthe deflectionbecomes2mmandthenpressure shallbemaintainedfor10±1sec. Measurementtobemadeafterkeepingat roomtemperaturefor24±2hours. Nomechanicaldamage. Electricalspecificationshallsatisfythe descriptionsinelectricalcharacteristicsat theroomtemperature. Temperaturecycle IEC60068-2-14 GB/T2423.22 30minutesat-40°C±2°C. 10~15minutesatroomtemperature. 30minutesat+85°C±2°C. 10~15minutesatroomtemperature. Total100continuouscyclesMeasurement tobemadeafterkeepingatroom temperaturefor24±2hrs. Nomechanicaldamage. Electricalspecificationshallsatisfythe descriptionsinelectricalcharacteristicsat theroomtemperature. Hightemperature IEC60068-2-2 GB/T2423.2 *Temperature：85±2°C. *Testduration：500+24/-0hours. Measurementtobemadeafterkeepingat roomtemperaturefor24±2hrs. Nomechanicaldamage. Electricalspecificationshallsatisfythe descriptionsinelectricalcharacteristics. Humidity(steady conditions) IEC60068-2-3 GB/T2423.3 *Humidity：85±5%R.H. *Temperature：85±2°C. *Time：500+24/-0hrs. Measurementtobemadeafterkeeping atroomtemperaturefor24±2hrs ※200hrsmeasuringthefirstdatathen300hrs data. Nomechanicaldamage. Electricalspecificationshallsatisfythe descriptionsinelectricalcharacteristicsat theroomtemperature. Lowtemperature IEC60068-2-1 GB/T2423.1 *Temperature：-40±2°C. *Testduration：500+24/-0hours Measurementtobemadeafterkeepingat roomtemperaturefor24±2hrs. Nomechanicaldamage. Electricalspecificationshallsatisfythe descriptionsinelectricalcharacteristicsat theroomtemperature.

No.：BCTC/RF-EMC-005 Page 1 of 64 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2303256961E Applicant: Shenzhen Elenose Technology Co. LTD Product Name: Air conduction wireless earphone Model/Type Ref.: BH831 Tested Date: 2023-03-30 to 2023-04-04 Issued Date: 2023-04-04 Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 2 of 64 Edition：A.5 FCC ID:2AQ9R-BH831 The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. Product Name: Air conduction wireless earphone Trademark: N/A Model/Type Ref.: BH831 Prepared For: Shenzhen Elenose Technology Co. LTD Address: Room 423, Building 8, Zijing No.1, Huahui Road, Tongsheng Community, Dalang Street, Longhua District, Shenzhen, Guangdong, China Manufacturer: Shenzhen Elenose Technology Co. LTD Address: Room 423, Building 8, Zijing No.1, Huahui Road, Tongsheng Community, Dalang Street, Longhua District, Shenzhen, Guangdong, China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2023-03-30 Sample tested Date: 2023-03-03 to 2023-04-04 Issue Date: 2023-04-04 Report No.: BCTC2303256961E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth Classic radio test report. Tested by: Approved by: Jeff.Fu/Project Handler Zero Zhou/Reviewer Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 3 of 64 Edition：A.5 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 8 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List .......................................................................................................... 9 4.5 Test Mode ........................................................................................................... 10 4.6 table of parameters of text software setting ........................................................ 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test Procedure ................................................................................................... 13 6.4 EUT Operating Conditions .................................................................................. 13 6.5 Test Result .......................................................................................................... 14 7. Radiated Emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test Procedure ................................................................................................... 18 7.4 EUT Operating Conditions .................................................................................. 19 7.5 Test Result .......................................................................................................... 19 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 23 8.1 Block Diagram Of Test Setup .............................................................................. 23 8.2 Limit .................................................................................................................... 23 8.3 Test Procedure ................................................................................................... 24 8.4 EUT Operating Conditions .................................................................................. 24 8.5 Test Result .......................................................................................................... 25 9. Conducted Emission ........................................................................................... 26 9.1 Block Diagram Of Test Setup .............................................................................. 26 9.2 Limit .................................................................................................................... 26 9.3 Test Procedure ................................................................................................... 26 9.4 Test Resu…

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Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 53 of 64 Edition：A.5 13. Number Of Hopping Frequency 13.1 Block Diagram Of Test Setup 13.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. 13.3 Test Procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set the spectrum analyzer: RBW = 100kHz. VBW = 300kHz. Sweep = auto; Detector Function = Peak. Trace = Max hold. 3. Allow the trace to stabilize. It may prove necessary to break the span up to sections. in order to clearly show all of the hopping frequencies. The limit is specified in one of the subparagraphs of this Section. 4. Set the spectrum analyzer: Start Frequency = 2.4GHz, Stop Frequency = 2.4835GHz. Sweep=auto; Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 54 of 64 Edition：A.5 13.4 Test Result Test Graphs Hopping No. NVNT 1-DH1 2441MHz Hopping No. NVNT 2-DH1 2441MHz Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 55 of 64 Edition：A.5 14. Dwell Time 14.1 Block Diagram Of Test Setup 14.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Frequency hopping systems may avoid or suppress transmissions on a particular hopping frequency provided that a minimum of 15 channels are used. 14.3 Test Procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set spectrum analyzer span = 0. Centred on a hopping channel; 3. Set RBW = 1MHz and VBW = 3MHz.Sweep = as necessary to capture the entire dwell time per hopping channel. Set the EUT for DH5, DH3 and DH1 packet transmitting. 4. Use the marker-delta function to determine the dwell time. If this value varies with different modes of operation (e.g.. data rate. modulation format. etc.). repeat this test for each variation. The limit is specified in one of the subparagraphs of this Section. Submit this plot(s). Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 56 of 64 Edition：A.5 14.4 Test Result DH5 Packet permit maximum 1600 / 79 / 6 hops per second in each channel (5 time slots RX, 1 time slot TX). DH3 Packet permit maximum 1600 / 79 / 4 hops per second in each channel (3 time slots RX, 1 time slot TX). DH1 Packet permit maximum 1600 / 79 /2 hops per second in each channel (1 time slot RX, 1 time slot TX). So, the Dwell Time can be calculated as follows: DH5:1600/79/6*0.4*79*(MkrDelta)/1000 DH3:1600/79/4*0.4*79*(MkrDelta)/1000 DH1:1600/79/2*0.4*79*(MkrDelta)/1000 Remark: Mkr Delta is once pulse time. Modulation Channel Data Packet pulse time(ms) Dwell Time(s) Limits(s) GFSK Middle DH1 0.381 0.122 0.4 DH3 1.638 0.262 0.4 DH5 2.887 0.308 0.4 π/4DQPSK Middle 2DH1 0.391 0.125 0.4 2DH3 1.643 0.263 0.4 2DH5 2.892 0.308 0.4 Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 57 of 64 Edition：A.5 Test Graphs Dwell NVNT 1-DH1 2441MHz One Burst Dwell NVNT 1-DH3 2441MHz One Burst Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 58 of 64 Edition：A.5 Dwell NVNT 1-DH5 2441MHz One Burst Dwell NVNT 2-DH1 2441MHz One Burst Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 59 of 64 Edition：A.5 Dwell NVNT 2-DH3 2441MHz One Burst Dwell NVNT 2-DH5 2441MHz One Burst Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 60 of 64 Edition：A.5 15. Antenna Requirement 15.1 Limit 15.203 requirement: For intentional device, according to 15.203: an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. 15.2 Test Result The EUT antenna is Chip antenna, The antenna gain is 4.34 dBi, fulfill the requirement of this section. Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 61 of 64 Edition：A.5 16. EUT Photographs EUT Photo 1 EUT Photo 2 Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 62 of 64 Edition：A.5 17. EUT Test Setup Photographs Conducted Emissions Photo Radiated Measurement Photos Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 63 of 64 Edition：A.5 Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 64 of 64 Edition：A.5 STATEMENT 1. The equipment lists are traceable to the national reference standards. 2. The test report can not be partially copied unless prior written approval is issued from our lab. 3. The test report is invalid without the "special seal for inspection and testing". 4. The test report is invalid without the signature of the approver. 5. The test process and test result is only related to the Unit Under Test. 6. Sample information is provided by the client and the laboratory is not responsible for its authenticity. 7. The test report without CMA mark is only used for scientific research, teaching, enterprise product development and internal quality control purposes. 8. The quality system of our laboratory is in accordance with ISO/IEC17025. 9. If there is any objection to this test report, the client should inform issuing laboratory within 15 days from the date of receiving test report. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China TEL：400-788-9558 P. C.: 518103 FAX：0755-33229357 Website：http://www.chnbctc.com E-Mail：[email protected] ※※※※※ END ※※※※※

Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 62 of 64 Edition：A.5 17. EUT Test Setup Photographs Conducted Emissions Photo Radiated Measurement Photos Report No.: BCTC2303256961E No.：BCTC/RF-EMC-005 Page 63 of 64 Edition：A.5