2AQK8-S10Wireless Earbuds

NOTE: 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. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC ID: 2AQK8-S10

Chandasung Tech (Shenzhen) Co., Ltd. Agent Authorization Company: Chandasung Tech (Shenzhen) Co., Ltd. Address: Rm 802, Building B, Zhonghengsheng High-tech Zone, No.3 Xinyu Road Xinqiao Street, Bao’an District, Shenzhen, China. Product Name: Wireless Earbuds Model Number(s): S10, D79 Product Description: Wireless Earbuds 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: Date: 2022-12-22 Name: Lisa Peng Company: Chandasung Tech (Shenzhen) Co., Ltd.

Chandasung Tech (Shenzhen) Co., Ltd Sep.29, 2022 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject: Explanation of differences between product types FCC ID : 2AQK8-S10 Model Number: S10, D79 To Whom It May Concern: We, The Chandasung Tech (Shenzhen) Co., Ltd hereby declare that the models are identical except the model name. Except for the different above, no other modification is performed. Sincerely, Signature: Chandasung Tech (Shenzhen) Co., Ltd Contact person: Lisa Peng

Report No.: AGC00427221201AP02 Page 1 of 4 EXTERNAL PHOTOS ALL VIEW OF EUT TOP VIEW OF EUT Report No.: AGC00427221201AP02 Page 2 of 4 BOTTOM VIEW OF EUT FRONT VIEW OF EUT Report No.: AGC00427221201AP02 Page 3 of 4 BACK VIEW OF EUT LEFT VIEW OF EUT Report No.: AGC00427221201AP02 Page 4 of 4 RIGHT VIEW OF EUT ****************************************End of Report****************************************

FCC ID Label Location The product does not have enough space to place the label, and FCC ID label is reflected in the user manual and package, as below:

Report No.: AGC00427221001AP02 Page 1 of 4 INTERNAL PHOTOS OPEN VIEW OF EUT BATTERY VIEW OF EUT Report No.: AGC00427221001AP02 Page 2 of 4 Left INTERNAL VIEW OF EUT (FIGURE 1) INTERNAL VIEW OF EUT (FIGURE 2) BT Antenna Report No.: AGC00427221001AP02 Page 3 of 4 INTERNAL VIEW OF EUT (FIGURE 3) Right INTERNAL VIEW OF EUT (FIGURE 1) Report No.: AGC00427221001AP02 Page 4 of 4 INTERNAL VIEW OF EUT (FIGURE 2) INTERNAL VIEW OF EUT (FIGURE 3) ****************************************End of Report**************************************** BT Antenna

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description Wireless Earbuds Model Name S10 Series Model D79 FCC ID 2AQK8-S10 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v06 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 3. CALCULATION Left (BR/EDR): P t =8.222dBm=6.64mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(6.64mW /5mm) .[√2.402GHz)]=2.07<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Left (BLE 1M): P t =6.133dBm=4.10mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(4.10mW /5mm) .[√2.480GHz)]=1.29<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Left (BLE 2M): P t =5.852dBm=3.82mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(3.82mW /5mm) .[√2.480GHz)]=1.20<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. 4. CONCLUSION The SAR evaluation is not required.

Page 1 of 72 FCC Test Report Report No.: AGC00427221201FE03 FCC ID : 2AQK8-S10 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Wireless Earbuds BRAND NAME : BOLOXA MODEL NAME : S10, D79 APPLICANT : Chandasung Tech (Shenzhen) Co., Ltd. DATE OF ISSUE : Dec. 19, 2022 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC00427221201FE03 Page 2 of 72 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Dec. 19, 2022 Valid Initial Release Report No.: AGC00427221201FE03 Page 3 of 72 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY .................................................................................................................. 5 2. GENERAL INFORMATION .............................................................................................................................. 6 2.1. PRODUCT DESCRIPTION ........................................................................................................................ 6 2.2. TABLE OF CARRIER FREQUENCYS ....................................................................................................... 6 2.3. RECEIVER INPUT BANDWIDTH .............................................................................................................. 7 2.4. EXAMPLE OF A HOPPING SEQUENCY IN DATA MODE ......................................................................... 7 2.5. EQUALLY AVERAGE USE OF FREQUENCIES AND BEHAVIOUR ......................................................... 7 2.6. RELATED SUBMITTAL(S) / GRANT (S) .................................................................................................... 8 2.7. TEST METHODOLOGY ............................................................................................................................. 8 2.8. SPECIAL ACCESSORIES ......................................................................................................................... 8 2.9. EQUIPMENT MODIFICATIONS ................................................................................................................. 8 2.10. ANTENNA REQUIREMENT..................................................................................................................... 8 3. MEASUREMENT UNCERTAINTY ................................................................................................................... 9 4. DESCRIPTION OF TEST MODES ................................................................................................................. 10 5. SYSTEM TEST CONFIGURATION ................................................................................................................. 11 5.1. CONFIGURATION OF EUT SYSTEM ....................................................................................................... 11 5.2. EQUIPMENT USED IN TESTED SYSTEM ............................................................................................... 11 5.3. SUMMARY OF TEST RESULTS ............................................................................................................... 11 6. TEST FACILITY .............................................................................................................................................. 12 7. PEAK OUTPUT POWER ................................................................................................................................ 13 7.1. MEASUREMENT PROCEDURE ............................................................................................................. 13 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 13 7.3. LIMITS AND MEASUREMENT RESULT .................................................................................................. 14 8. 20DB BANDWIDTH ........................................................................................................................................ 24 8.1. MEASUREMENT PROCEDURE ............................................................................................................. 24 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 24 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................... 25 9. CONDUCTED SPURIOUS EMISSION........................................................................................................... 30 9.1. MEASUREMENT PROCEDURE ............................................................................................................. 30 Report No.: AGC00427221201FE03 Page 4 of 72 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 30 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................... 30 9.4. LIMITS AND MEASUREMENT RESULT .................................................................................................. 30 10. RADIATED EMISSION ................................................................................................................................. 51 10.1. MEASUREMENT PROCEDURE ........................................................................................................... 51 10.2. TEST SETUP ......................................................................................................................................... 53 10.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 54 10.4. TEST RESULT........................................................................................................................................ 54 11. NUMBER OF HOPPING FREQUENCY ..................................................................…

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Report No.: AGC00427221201FE03 Page 57 of 72 Radiated emission above 1GHz EUT Wireless Earbuds Model Name S10 Temperature 22°C Relative Humidity 54% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 4 Antenna Horizontal FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) Value Type 4804.000 51.7474-22.26 peak 4804.000 39.6554-14.35 AVG 7206.000 47.4574-26.55 peak 7206.000 35.9554-18.05 AVG 51.660.08 39.570.08 45.242.21 33.742.21 Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. EUT Wireless Earbuds Model Name S10 Temperature 22°C Relative Humidity 54% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 4 Antenna Vertical FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) Value Type 4804.000 48.7574-25.25 peak 4804.000 38.5554-15.45 AVG 7206.000 45.2974-28.71 peak 7206.000 35.9754-18.03 AVG 48.670.08 38.470.08 43.082.21 33.762.21 Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. Report No.: AGC00427221201FE03 Page 58 of 72 EUT Wireless Earbuds Model Name S10 Temperature 22°C Relative Humidity 54% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 5 Antenna Horizontal FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) Value Type 4882.000 49.8174-24.19 peak 4882.000 38.4854-15.52 AVG 7323.000 47.6374-26.37 peak 7323.000 35.5754-18.43 AVG 49.670.14 38.340.14 45.272.36 33.212.36 Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. EUT Wireless Earbuds Model Name S10 Temperature 22°C Relative Humidity 54% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 5 Antenna Vertical FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) 4882.000 48.4674-25.54 peak 4882.000 37.9754-16.03 AVG 7323.000 45.8174-28.19 peak 7323.000 35.3354-18.67 AVG Value Type 48.320.14 37.830.14 43.452.36 32.972.36 Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. Report No.: AGC00427221201FE03 Page 59 of 72 EUT Wireless Earbuds Model Name S10 Temperature 22°C Relative Humidity 54% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 6 Antenna Horizontal FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) Value Type 4960.000 49.8774-24.13 peak 4960.000 37.7654-16.24 AVG 7440.000 46.8374-27.17 peak 7440.000 35.5154-18.49 AVG 49.650.22 37.540.22 44.192.64 32.872.64 Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. EUT Wireless Earbuds Model Name S10 Temperature 22°C Relative Humidity 54% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 6 Antenna Vertical FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) Value Type 4960.000 47.8974-26.11 peak 4960.000 37.7554-16.25 AVG 7440.000 44.8874-29.12 peak 7440.000 34.5854-19.42 AVG 47.670.22 37.530.22 42.242.64 31.942.64 Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. RESULT: PASS Note: The amplitude of other spurious emissions from 1G to 25 GHz which are attenuated more than 20 dB below the permissible value need not be reported. Factor = Antenna Factor + Cable loss - Amplifier gain, Margin=Emission Level-Limit. The “Factor” value can be calculated automatically by software of measurement system. All test modes had been tested. The π /4-DQPSK modulation is the worst case and recorded in the report. Report No.: AGC00427221201FE03 Page 60 of 72 Test result for band edge emission at restricted bands EUT Wireless Earbuds Model Name S10 Temperature 24°C Relative Humidity 56% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 4 Antenna Horizontal Test Graph for Peak Measurement Test Graph for Average Measurement RESULT: PASS Report No.: AGC00427221201FE03 Page 61 of 72 EUT Wireless Earbuds Model Name S10 Temperature 24°C Relative Humidity 56% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 4 Antenna Vertical Test Graph for Peak Measurement Test Graph for Average Measurement RESULT: PASS Report No.: AGC00427221201FE03 Page 62 of 72 EUT Wireless Earbuds Model Name S10 Temperature 24°C Relative Humidity 56% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 6 Antenna Horizontal Test Graph for Peak Measurement Test Graph for Average Measurement RESULT: PASS Report No.: AGC00427221201FE03 Page 63 of 72 EUT Wireless Earbuds Model Name S10 Temperature 24°C Relative Humidity 56% Pressure 985hPa Test Voltage Normal Voltage Test Mode Mode 6 Antenna Vertical Test Graph for Peak Measurement Test Graph for Average Measurement RESULT: PASS Note: The factor had been edited in the “Input Correction” of the Spectrum Analyzer. The π /4-DQPSK modulation is the worst case and recorded in the report. Report No.: AGC00427221201FE03 Page 64 of 72 11. NUMBER OF HOPPING FREQUENCY 11.1. MEASUREMENT PROCEDURE The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: The frequency band of operation. Depending on the number of channels the device supports, it may be necessary to divide the frequency range of operation across multiple spans, to allow the individual channels to be clearly seen. 2. RBW: To identify clearly the individual channels, set the RBW to less than 30% of the channel spacing or the 20 dB bandwidth, whichever is smaller. 3. VBW ≥ RBW. Sweep: Auto. Detector function: Peak. Trace: Max hold. 4. Allow the trace to stabilize. 11.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION) Same as described in section 8.2 11.3. MEASUREMENT EQUIPMENT USED The same as described in section 6 11.4. LIMITS AND MEASUREMENT RESULT Test Data of Number of Hopping Frequency Test Mode Number of Hopping Frequency Limits Pass or Fail GFSK Hopping 79 >=15 Pass Test Graphs of Number of Hopping Frequency Test_Graph_BR_HOP_ANT1_NA_1Mbps_Number of Hopping Note: The GFSK modulation is the worst case and recorded in the report. Report No.: AGC00427221201FE03 Page 65 of 72 12. TIME OF OCCUPANCY (DWELL TIME) …

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2.4GHz 3216 Chip Antenna: YL3216F5P2G45 _______________________________________________________________________________________ Application: WLAN, 802.11b/g, Bluetooth, etc... Features SMD, high reliability, ultra Impact, Omni-directional... Part number 3216 - F5 P 2G45 YL (1) (2) (3) (4) (5) (1)Product Type Chip Antenna (2)Size Code 3.2x1.6mm (3)Type Code F5 (4)Packing Paper Tape (5)Frequency 2.45GHz Electrical Specification W orking Frequency Range 2400 ~2484 MHz Peak Gain 1.8 dBi (Typ.) Impedance 50 Ohm Return loss 10 dB ( Min) Polarization Linear Azimuth Beamwidth Omni-directional Operation Temperature(°C) -40 ~85°C The specification is defined on EVB. Dimension and Terminal Configuration Dimension (mm) No. Terminal Name L 3.15+-0.15 1 Feeding point W 1.55+-0.15 2 GND T 0.50+-0.10 A 0.35+-0.10 永联无线 2.4GHz 3216 Chip Antenna: YL3216F5P2G45 ______________________________________________________________________________________________________ Evaluation Board Reference PCB Dimension Antenna Layout Reference unit :mm Electrical Characteristics Return Loss & Radiation Return Loss Frequency (MHz) S11 (dB) 2400 -11.0 2442 -20.2 2484 -10.6 Radiation 2.4GHz 3216 Chip Antenna:YL3216F5P2G45 ______________________________________________________________________________________________________ Taping Specifications Reel and Taping Specification Reel Specification TYPE SIZE A ψB ψC ψD W ψM 3216 7” 3K/Reel2.0±0.5 13.5±1.0 21±1.0 60±1.0 11.5±2.0 178±2.0 Tapping Specification Packaging Type A B W E F G H T ψD P Paper Type 3216 1.90±0.20 3.50±0.20 8.0±0.20 1.75±0.10 3.5±0.05 4.0±0.10 2.0±0.05 0.75±0.10 +0.10 1.50 -0 4.0±0.1 2.4GHz 3216 Chip Antenna:YL3216F5P2G45 ______________________________________________________________________________________________________ Reliability Table Test ItemProcedure Requirements Ceramic Type Remark (Reference) Electrical Characterization Fulfill the electrical specification User Spec. Thermal Shock 1. Preconditioning: 50 ± 10°C / 1 hr , then keep for 24 ± 1 hrs at room temp. 2. Initial measure: Spec: refer Initial spec. 3. Rapid change of temperature test: -30°C to +85°C; 100 cycles; 15 minutes at Lower category temperature; 15 minutes at Upper category temperature. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 107 Temperature Cycling 1. Initial measure: Spec: refer Initial spec. 2. 100 Cycles (-30°C to +85°C), Soak Mode=1 (2 Cycle/hours). 3. Measurement at 24 ± 2Hours after test condition. No Visible Damage. Fulfill the electrical specification. JESD22 JA104 High Temperature Exposure 1. Initial measure: Spec: refer Initial spec. 2. Unpowered; 500hours @ T=+85°C. 3. Measurement at 24 ± 2 hours after test. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 108 Low Temperature Storage 1. Initial measure: Spec: refer Initial spec. 2. Unpowered: 500hours @ T= -30°C. 3. Measurement at 24 ± 2 hours after test. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 108 Solderability (SMD Bottom Side) Dipping method: a. Temperature: 235 ± 5°C b. Dipping time: 3 ± 0.5s The solder should cover over 95% of the critical area of bottom side. IEC 60384-21/22 4.10 Soldering Heat Resistance (RSH) Preheating temperature: 150 ± 10°C. Preheating time: 1~2 min. Solder temperature: 260 ± 5°C. Dipping time: 5 ± 0.5s No Visible Damage.IEC 60384-21/22 4.10 Vibration5g's for 20 min., 12 cycles each of 3 orientations Note: Use 8"X5" PCB .031" thick 7 secure points on, one long side and 2 secure points at corners of opposite sides. Parts mounted within 2" from any secure point. Test from 10-2000 Hz. No Visible Damage.MIL-STD-202 Method 204 Mechanical Shock Three shocks in each direction shall be applied along the three mutually perpendicular axes of the test specimen (18 shocks) Peak value: 1,500g’s Duration: 0.5ms Velocity change: 15.4 ft/s Waveform: Half-sine No Visible Damage.MIL-STD-202 Method 213 Humidity Bias 1. Humidity: 85% R.H., Temperature: 85 ± 2 °C. 2. Time: 500 ± 24 hours. 3. Measurement at 24 ± 2hrs after test condition. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 Method 106 2.4GHz 3216 Chip Antenna: YL3216F5P2G45 ______________________________________________________________________________________________________ Revision History Revision Date Content 1 2019/7/20New issue Board Flex (SMD) 1. Mounting method: IR-Reflow. PCB Size (L:100 × W:40 × T:1.6mm) 2. Apply the load in direction of the arrow until bending reaches 2 mm. No Visible Damage.AEC-Q200 005 AdhesionForce of 1.8Kg for 60 seconds.No Visible Damage Magnification of 20X or greater may be employed for inspection of the mechanical integrity of the device body terminals and body/terminal junction. AEC-Q200 006 Physical Dimension Any applicable method using x10 magnification, micrometers, calipers, gauges, contour projectors, or other measuring equipment, capable of determining the actual specimen dimensions. In accordance with specification. JESD22 JB100

Report No.: AGC00427221201AP01 Page 1 of 2 TEST SETUP PHOTOS RADIATED EMISSION TEST SETUP BELOW 1GHz RADIATED EMISSION TEST SETUP ABOVE 1GHz Report No.: AGC00427221201AP01 Page 2 of 2 RF CONDUCTED TEST SETUP ****************************************End of Report*************************************