2BBMZ-AVR-1680Multi-channel audio amplifier

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Procella Audio Svenska AB * the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter ATTN.: Reviewing Engineer FCC ID: 2BBMZ-AVR-1680 FRN of applicant: 0033879982 Per section 2.911(d)(7) of the FCC rules, Procella Audio Svenska AB (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: JOC Australia Inc Physical U.S. Company Address: 18351 Colima Road Ste 585 Rowland Heights,California,91748 United States of America Agent contact name/Title : Benjamin. Smith/Vice President Agent Email Address: [email protected]/[email protected] Tel No.: +1(626) 217 4778 FRN No.: 0033379421 The above contact person accepts the obligation for service of process. The applicant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Signed: Agent Signed Signed: Printed name: Title: Vice President Date: 7/17/2023

External Photos M/N: AVR-1680 Bluetooth Antenna External Photos M/N: AVR-1680 External Photos M/N: AVR-1680

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Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680 Internal Photos M/N: AVR-1680

FCC ID: 2BBMZ-AVR-1680 EST Technology Co. ,Ltd Report No. ESTE-R2307157 Page 1 of 4 FCC 47 CFR MPE REPORT Procella Audio Svenska AB Multi-channel audio amplifier Model Number: AVR-1680 FCC ID: 2BBMZ-AVR-1680 Applicant: Procella Audio Svenska AB Address: Vassunda Säby 584 741 91 Knivsta Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2307157 Date of Test: Jun. 14, ~Jul. 13, 2023 Date of Report: Jul. 14, 2023 FCC ID: 2BBMZ-AVR-1680 EST Technology Co. ,Ltd Report No. ESTE-R2307157 Page 2 of 4 Maximum Permissible Exposure 1. Applicable Standards Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as a mobile device whereby a distance of 0.2m normally can be maintained between the user and the device. 1.1. Limits for Maximum Permissible Exposure (MPE) (a) Limits for Occupational/Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times ︱E︱ 2 ,︱H︱ 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-10000 5 6 (b) 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 ) Averaging Times ︱E︱ 2 ,︱H︱ 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-10000 1.o 30 Note: f=frequency in MHz; *Plane-wave equivalent power density FCC ID: 2BBMZ-AVR-1680 EST Technology Co. ,Ltd Report No. ESTE-R2307157 Page 3 of 4 1.2. MPE Calculation Method E (V/m) = d G × P × 30 Power Density: Pd (W/m 2 ) = 377 E 2 E = Electric Field (V/m) P = Peak RF output Power (W) G = EUT Antenna numeric gain (numeric) d = Separation distance between radiator and human body (m) The formula can be changed to Pd = 2 d × 377 G × P × 30 From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained FCC ID: 2BBMZ-AVR-1680 EST Technology Co. ,Ltd Report No. ESTE-R2307157 Page 4 of 4 2. Conducted Power Result Mode Frequency (MHz) Peak output power (dBm) Peak output power (mW) GFSK 2402 2.52 1.786 2441 2.18 1.652 2480 1.78 1.507 π /4-DQPSK 2402 4.16 2.606 2441 3.6 2.291 2480 3.06 2.023 8-DPSK 2402 4.27 2.673 2441 3.86 2.432 2480 3.29 2.133 BLE 1M 2402 2.6 1.820 2440 2.4 1.738 2480 1.89 1.545 3. Calculated Result and Limit Mode Peak output power (dBm) Target power （dBm ） MAX Target power （dBm） Antenna gain Power Density (S) (mW /cm2) Limited of Power Density (S) (mW /cm2) Test Result (dBi) (Linear ) 2.4G Band GFSK 2.52 2±1 3 3 1.995 0.00079 1 Complies π/4-DQPSK 4.16 4±1 5 3 1.995 0.00126 1 Complies 8-DPSK 4.27 4±1 5 3 1.995 0.00126 1 Complies BLE 1M 2.6 2±1 3 3 1.995 0.00079 1 Complies End of Test Report

深圳市科信无线技术有限公司 地址：深圳市龙岗区宝龙街道龙新社区沙背坜鸿永利工业区H栋业务：黄小姐17376858871电话：0755-28700870 1 样品承认书 SPECIFICATIONOFAPPROVAL 客户 CUSTOMER: 品名 DESCRIPTION:2.4G小折叠胶棒天线 品名编号 PARTNO:KX-2.4G-11CM 内部签核（SIGNATURE） 核准工程品保 王飞吴喜娥刘春玉 2021年（YEAR）05月（MONTH）22（DAY） 客户承认（CUSTOMERAPPROVAL） 确认结果工程品保 合格不合格 2021年（YEAR）月（MONTH）日（DAY） 深圳市科信无线技术有限公司 地址：深圳市龙岗区宝龙街道龙新社区沙背坜鸿永利工业区H栋业务：黄小姐17376858871电话：0755-28700870 2 Index: 1.Specification 2.CharacteristicsandReliabilityTest 3.Antenna-SParameterTestData 4.Antenna-RadiationPatternTestData 5.MechanicalandPackingDrawing 深圳市科信无线技术有限公司 地址：深圳市龙岗区宝龙街道龙新社区沙背坜鸿永利工业区H栋业务：黄小姐17376858871电话：0755-28700870 3 1.Specification SamplePhoto A.ElectricalCharacteristics Frequency2400~2500MHz S.W.R.<=1.5 AntennaGain3.0dBi PolarizationLinear Impedance50Ohm B.Material&MechanicalCharacteristics MaterialofRadiatorCu MaterialofPlasticBody:TPE Hinge:ABS Holder:PA+ABS CableTypeRG-178 ConnectorTypeSMAMaleReverse ConnectorPullTest>=5Kg ConnectorTorqueTest300~1000g.cm C.Environmental OperationTemperature-40 ̊C~+65 ̊C StorageTemperature-40 ̊C~+80 ̊C 深圳市科信无线技术有限公司 地址：深圳市龙岗区宝龙街道龙新社区沙背坜鸿永利工业区H栋业务：黄小姐17376858871电话：0755-28700870 4 2.CharacteristicsandReliabilityTest TestItemsTestConditionandProcedureRequirements C1S.W.R.SetDUTonNetworkAnalyzer;makeindividual calibrationtotest DirectiveDUTspecification C2Antenna Gain SetDUTonAntennaChamber;makeindividual calibrationtotest DirectiveDUTspecification M1VibrationMIL-STD-202G,201A Amplitude:0.03inch(0.76mm);Freq:10to55Hz 3directions;2hoursforeachdirection 1.NoVisualDamage 2.FrequencyTol.<=5% M2Random Drop Height:1.5Meter; 3directions;1timeforeachdirection 1.Nopartsseparated 2.FrequencyTol.<=5% M3SolderabilityMIL-STD-202G,210F,cond.A Solderiron:350±10°C;Duration:5seconds 1.MountedonPCB 2.NoVisualDamage M4Terminal- PullTest MIL-STD-202G,211A,cond.A Holdingwithindividualspecification;forceapplied toaxisofterminal 1.DirectiveDUTspecification 2.FrequencyTol.<=5% M5Terminal- TorqueTest MIL-STD-202G,211A,cond.E Holdingwithindividualspecification;applied clockwiseandcounterclockwisetotheaxisof terminal 1.DirectiveDUTspecification 2.FrequencyTol.<=5% M6DimensionInspectionofdimension,color,material,package, surfaceprocess DirectiveDUTspecification E1SaltSprayMIL-STD-202G,101E,cond.B Temp:35°C;RH:>=95%;NaClsolution:>=5%; Time:48hours After2HoursRecovery 1.NoVisualDamage 2.FrequencyTol.<=5% E2HumidityMIL-STD-202G,103B,cond.B Temp:40°C;RH:>=95%;Time:48hours After2HoursRecovery 1.NoVisualDamage 2.FrequencyTol.<=5% E3Thermal Shock 1Cycle:-40°C(30minutes)to+80°C(30minutes) Cycles:24 After2HoursRecovery 1.NoVisualDamage 2.FrequencyTol.<=5% E4Life(High Temp.) MIL-STD-202G,108A,cond.A Temp:85°C;Time:96hours After2HoursRecovery 1.NoVisualDamage 2.FrequencyTol.<=5% R1RoHSWithReferencetoIEC62321:2008withflowchartDirectiveRoHS2002/95/EC R2PFOSWithReferencetoUSAEPA3540C:1996byLC/MSDirectiveRoHS2006/122/EC R3PFOAWithReferencetoUSAEPA3540C:1996byLC/MSDirectiveRoHS2006/122/EC 深圳市科信无线技术有限公司 地址：深圳市龙岗区宝龙街道龙新社区沙背坜鸿永利工业区H栋业务：黄小姐17376858871电话：0755-28700870 5 3.Antenna-SParameterTestData 地址：深圳市龙岗区宝龙街道龙新社区沙背坜鸿永利工业区H栋业务：黄小姐17376858871电话：0755-28700870 6 4.Antenna-RadiationPatternTestData TestingEquipmentSpecification: AntennaAnechoicChamberDimension:8x4x 4mQuiteZone:600mm@1GHz Isolation:>100dB@1MHz ~10GHzTestingEquipment: Agilent5071B ReceivedAntenna:0.7~6.0GHzforGain CalibrationDoubleRidgedHornAntenna 深圳市科信无线技术有限公司 地址：深圳市龙岗区宝龙街道龙新社区沙背坜鸿永利工业区H栋业务：黄小姐17376858871电话：0755-28700870 7 5.MechanicalDrawing

FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 1 of 72 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of Procella Audio Svenska AB Multi-channel audio amplifier Model Number: AVR-1680 FCC ID: 2BBMZ-AVR-1680 Applicant : Procella Audio Svenska AB Address: Vassunda Säby 584 741 91 Knivsta Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2307156 Date of Test: Jun. 14, ~Jul. 13, 2023 Date of Report: Jul. 14, 2023 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 2 of 72 TABLE OF CONTENTS Description Page TEST REPORT VERIFICATION......................................................................................................................... 3 1. GENERAL INFORMATION ................................................................................................................. 5 1.1. Description of Device (EUT) ........................................................................................................... 5 1.2. Antenna Information ........................................................................................................................ 5 1.3. Information of RF Cable .................................................................................................................. 5 2. SUMMARY OF TEST ......................................................................................................................... 6 2.1. Summary of test result ...................................................................................................................... 6 2.2. Test Facilities ................................................................................................................................... 7 2.3. Measurement uncertainty ................................................................................................................. 8 2.4. Assistant equipment used for test ..................................................................................................... 8 2.5. Block Diagram ................................................................................................................................. 8 2.6. Test Mode ......................................................................................................................................... 9 2.7. Power Setting of Test Software ........................................................................................................ 9 2.8. Duty Cycle ...................................................................................................................................... 10 2.9. Channel List ................................................................................................................................... 11 2.10. Test Equipment List ....................................................................................................................... 12 3. 6DB BANDWIDTH .......................................................................................................................... 14 3.1. Limit ............................................................................................................................................... 14 3.2. Test Setup ....................................................................................................................................... 14 3.3. Spectrum Analyzer Setting ............................................................................................................. 14 3.4. Test Procedure ................................................................................................................................ 14 3.5. Test Result ...................................................................................................................................... 14 4. MAXIMUM PEAK OUTPUT POWER ................................................................................................. 15 4.1. Limit ............................................................................................................................................... 15 4.2. Test Setup ....................................................................................................................................... 15 4.3. Spectrum Analyzer Setting ............................................................................................................. 15 4.4. Test Procedure ................................................................................................................................ 15 4.5. Test Result ...................................................................................................................................... 15 5. POWER SPECTRAL DENSITY .......................................................................................................... 16 5.1. Limit ............................................................................................................................................... 16 5.2. Test Setup ....................................................................................................................................... 16 5.3. Spectrum Analyzer Setting ............................................................................................................. 16 5.4. Test Procedure ................................................................................................................................ 16 5.5. Test Result ...................................................................................................................................... 16 6. CONDUCTED BAND EDGE ............................................................................................................. 17 6.1. Limit .......................................................................................................................…

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FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 58 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 59 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 60 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 61 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 62 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 63 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 64 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 65 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 66 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 67 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 68 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 69 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 70 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 71 of 72 Internal Photos M/N: AVR-1680 FCC ID: 2BBMZ-AVR-1680 EST Technology Co., Ltd Report No.ESTE-R2307156 Page 72 of 72 Internal Photos M/N: AVR-1680 End of Test Report

Conducted Test Radiated Test (Below 1GHz) Radiated Test (Above 1GHz)