2ALHZNB-1092Bluetooth headphones

Manual Congratulations on your purchase and thank you for your use of our Bluetooth Active Noise Cancelling Headset. In order to start quickly, please read the user guide carefully. Caution 1. Please turn off the headset and put it into box to avoid damage, scratches or bracket deformation when long time no use. In order to prolong the battery service life, please charge every 6 months. 2. Please charge at first if the headset is left unused for long time. 3. The battery of headset is original and please don’t change it by yourself. 4. Please keep the headset under dry place. 5. Please don’t put this product into the environment with temperature over than 40°C or into fire to avoid battery blast accident. 6. Please don’t bent or twist the bracket to avoid deformation. 7. Please don’t tear down ear-cushions by un-professional person. 8. Don’t adjust the volume to a very high level and continued play. If tinnitus occurs, please turn the volume down or stop playing, do not turn the volume up suddenly. Please slowly turn up the volume to avoid hearing damage caused by high volume. 9. Do not use the headset in dangerous place or place where cannot hear the outside sound. Included: The headset contains the following parts: Bluetooth Active Noise Cancelling Headset X 1 Manual X 1 3.5mm – USB C audio Cable X 1 USB C Charging Cable X 1 Carry Case X1 Charge the Battery: The headset contains a USB C charging cable that can be connected to your computer or other device made for USB charging. Plug the USB C end of the included USB C cable into the USB C port charge connector under the left ear-cap of the headphone. Plug the other end into a USB port on your computer or other devices made for USB charging. The indicator light will be red while charging. Once fully charged, the indicator light will turn off. Charge time is about 1.5 hours on an empty battery. Active Noise Cancelling On: Hold the ANC button for 1 second. Green LED light will turn on. The ANC function is available at both Wired and Wireless condition. Active Noise Cancelling Off: Hold the ANC button for 1 second. Green LED light will turn off. The ANC function must be switched off by manual operation. Bluetooth Switch On: To switch on, press and hold the MFB about 3 seconds, blue light on, there is a tone “Power on, pairing”, The headset enters Bluetooth searching mode. Bluetooth Switch Off: To switch off, press and hold the MFB about 3 seconds, there is a tone “Power off”. Pairing: 1. Ensure that your phone or Bluetooth device is switched on. 2. To pair the headset if it has not been previously paired with a device, switch on the headset. The headset enters the pairing mode, and the blue indicator light starts to flash quickly. To pair the headset if it has been previously paired with another device, ensure that the previously paired devise is switched off. 3. Activate the Bluetooth feature on your phone or Bluetooth devices, and set it to search for Bluetooth devices. 4. Select “SNAP-ON NC HEADPHONES” from the list of found devices on your phone or Bluetooth devices. 5. When successfully connected, there is a tone “Bluetooth Connected”, the blue light turns to continuously lighting. The headset that has been previously paired with another device will automatically connect with the device if the device is power on and within connecting range, if not, the headset will enter standby mode with continuously blue light. Adjust the volume: Turn the volume up or down press the volume +/- key quickly during a call or while listening to music. Calls: Click the MFB to answer it, or press and hold about 1.5 seconds to reject the call. During a call, short press MFB to end it. Activate Voice Assist: Quickly Press the MFB twice to activate voice assist. Listen to Music: To play a song, select in the music player and press the MFB on the headset. To pause or resume playing a song, press the MFB. To select the next song during playback, press and hold the + key. To select the previous song, press and hold the volume - key. To increase the volume, press the + key quickly. To decrease the volume, press the - key. (Until Mute) Disconnect the Headset: To disconnect the headset from your device, switch off the headset, or disconnect it in Bluetooth menu of your device. Passive Mode: It can be a wired headphone to save batteries. Simply connect one end of the 3.5mm-USB C audio cable to the USB C port of the left ear cup to your MP3 player. Inserting an audio cable disable the wireless functionality. Low Battery Warning: At power on condition, when battery voltage is lower than 3.2V, there will be a warning “Please charge to prevent damage to the battery” every 60 seconds. Specification: Driver unit: 40mm Impedance: 32Ω Frequency Response: 20Hz-20KHz Bluetooth version: V5.0 Active noise reduction: up to 20-25 dB Radio Frequency coverage: 2.402GHZ~2.480GHZ Transmit Range: about 10m (barrier free) Codec support: AAC, SBC, aptX，aptX HD, aptX low latency Battery: Rechargeable li-ion battery; 3.7V, 650mAh Charge: Computer USB interface, output DC 5V/1A charger Charging time: 1.5 hours Operate hours: up to 26 hours (BT and ANC on) , 40 hours (BT on, ANC off) Standby time: up to 300 hours (battery saturation) Features: Active Noise Cancellation blocks ambient noise Extra-long battery life, up to 26 hours with ANC on, 40 hours ANC off Quick charging, 10 Min charge 5 hours playback Voice-Assistant support for Siri & Google Assistant Superior audio quality with AAC, aptX，aptX HD,AptX Low Latency codecs support USB-C charging and audio interface Unique Folding and lightweight design for easy carriage and storage Softer ear muffs for long time wear NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pur suant 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 ener…

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KO-STAR DEVELOPMENT CO., LTD Jun.17, 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 : 2ALHZNB-1092 Model Number: NB-1092, SSX23P106, NB-1100F, NB-1100, NB-1100FS, NB- 1100BF, NB-1300B, NB-1300BF, NB-1300, NB-1050, NB-1060, NB-1069, NB- 1090, NB-1090P, NB-1070, NB-1070S, NB-1094, NB-1093, NB-1700, NB- 1600, NB-2030, NB-1093, NB-1095, NB-1096, NB-1097, NB-1050, NB-2040 To Whom It May Concern: We, The KO-STAR DEVELOPMENT CO., LTD hereby declare that the models are identical except the model name and color. Except for the different above, no other modification is performed. Sincerely, Signature: KO-STAR DEVELOPMENT CO., LTD Contact person: LING YAN

KO-STAR DEVELOPMENT CO., LTD Agent Authorization Company: KO-STAR DEVELOPMENT CO., LTD Address: No.3, Yicun Industrial Area, Xikeng, Henggang Town, Longgang District Shenzhen, China Product Name: Bluetooth headphones Model Number(s): NB-1092, SSX23P106, NB-1100F, NB-1100, NB-1100FS, NB-1100BF, NB-1300B, NB-1300BF, NB-1300, NB-1050, NB-1060, NB-1069, NB-1090, NB-1090P, NB- 1070, NB-1070S, NB-1094, NB-1093, NB-1700, NB-1600, NB-2030, NB-1093, NB-1095, NB-1096, NB-1097, NB-1050, NB-2040 Product Description: Bluetooth headphones 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: 2022-06-17 Name: LING YAN Company: KO-STAR DEVELOPMENT CO., LTD

Report No.: AGC05177220502AP02 Page 1 of 3 EXTERNAL PHOTOS TOP VIEW OF EUT BOTTOM VIEW OF EUT Report No.: AGC05177220502AP02 Page 2 of 3 FRONT VIEW OF EUT BACK VIEW OF EUT Report No.: AGC05177220502AP02 Page 3 of 3 LEFT VIEW OF EUT RIGHT VIEW OF EUT ****************************************End of Report****************************************

FCC ID Label Location 3mm&20mm FCC ID: 2ALHZNB-1092

Report No.: AGC05177220502AP02 Page 1 of 4 INTERNAL PHOTOS VIEW OF EUT(PORT) OPEN VIEW OF EUT Report No.: AGC05177220502AP02 Page 2 of 4 VIEW OF BATTERY INTERNAL VIEW OF EUT-1 BT Antenna Report No.: AGC05177220502AP02 Page 3 of 4 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 Report No.: AGC05177220502AP02 Page 4 of 4 INTERNAL VIEW OF EUT-4 INTERNAL VIEW OF EUT-5 ****************************************End of Report****************************************

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description Bluetooth headphones Model Name NB-1092 Series Model SSX23P106, NB-1100F, NB-1100, NB-1100FS, NB-1100BF, NB-1300B, NB-1300BF, NB-1300, NB-1050, NB-1060, NB-1069, NB-1090, NB-1090P, NB-1070, NB-1070S, NB-1094, NB-1093, NB-1700, NB-1600, NB-2030, NB-1093, NB-1095, NB-1096, NB-1097, NB-1050, NB-2040 FCC ID 2ALHZNB-1092 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 BR&EDR: P t =0.601dBm=1.15mW 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=(1.15mW / 5mm).[√2.480GHz)]=0.361<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. BLE GFSK 1Mbps: P t =-2.104dBm=0.62mW 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=(0.62mW / 5mm).[√2.480GHz)]=0.195<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. BLE GFSK 2Mbps: P t =-2.206dBm=0.60mW 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=(0.60mW / 5mm).[√2.480GHz)]=0.188<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 44 FCC Test Report Report No.: AGC05177220502FE02 FCC ID : 2ALHZNB-1092 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Bluetooth headphones BRAND NAME : N/A MODEL NAME : NB-1092, SSX23P106, NB-1100F, NB-1100, NB-1100FS, NB-1100BF, NB-1300B, NB-1300BF, NB-1300, NB-1050, NB-1060, NB-1069, NB-1090, NB-1090P, NB-1070, NB-1070S, NB-1094, NB-1093, NB-1700, NB-1600, NB-2030, NB-1093, NB-1095, NB-1096, NB-1097, NB-1050, NB-2040 APPLICANT : KO-STAR DEVELOPMENT CO., LTD DATE OF ISSUE : Jun. 09, 2022 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC05177220502FE02 Page 2 of 44 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Jun. 09, 2022 Valid Initial Release Report No.: AGC05177220502FE02 Page 3 of 44 TABLE OF CONTENTS 1. VERIFICATION OF COMPLIANCE .................................................................................................................. 5 2. GENERAL INFORMATION .............................................................................................................................. 6 2.1. PRODUCT DESCRIPTION ........................................................................................................................ 6 2.2. TABLE OF CARRIER FREQUENCYS ....................................................................................................... 6 2.3. RELATED SUBMITTAL(S)/GRANT(S) ....................................................................................................... 7 2.4. TEST METHODOLOGY ............................................................................................................................. 7 2.5. SPECIAL ACCESSORIES .......................................................................................................................... 7 2.6. EQUIPMENT MODIFICATIONS ................................................................................................................. 7 2.7. ANTENNA REQUIREMENT ....................................................................................................................... 7 3. MEASUREMENT UNCERTAINTY ................................................................................................................... 8 4. DESCRIPTION OF TEST MODES ................................................................................................................... 9 5. SYSTEM TEST CONFIGURATION ................................................................................................................ 10 5.1. CONFIGURATION OF TESTED SYSTEM ............................................................................................... 10 5.2. EQUIPMENT USED IN TESTED SYSTEM .............................................................................................. 10 5.3. SUMMARY OF TEST RESULTS .............................................................................................................. 10 6. TEST FACILITY .............................................................................................................................................. 11 7. PEAK OUTPUT POWER ................................................................................................................................ 12 7.1. MEASUREMENT PROCEDURE .............................................................................................................. 12 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 12 7.3. LIMITS AND MEASUREMENT RESULT .................................................................................................. 13 8. BANDWIDTH .................................................................................................................................................. 15 8.1. MEASUREMENT PROCEDURE .............................................................................................................. 15 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 15 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................... 15 9. CONDUCTED SPURIOUS EMISSION........................................................................................................... 19 9.1. MEASUREMENT PROCEDURE .............................................................................................................. 19 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 19 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................... 19 9.4. LIMITS AND MEASUREMENT RESULT .................................................................................................. 19 10. MAXIMUM CONDUCTED OUTPUT POWER SPECTRAL DENSITY ........................................................ 26 10.1. MEASUREMENT PROCEDURE ............................................................................................................ 26 10.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................. 26 10.3. MEASUREMENT EQUIPMENT USED .................................................................................................. 26 10.4. LIMITS AND MEASUREMENT RESULT................................................................................................ 26 11. RADIATED EMISSION ................................................................................................................................. 28 11.1. MEASUREMENT PROCEDURE ............................................................................................................ 28 11.2. TEST SETUP ...................................................................…

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Page 1 of 44 FCC Test Report Report No.: AGC05177220502FE04 FCC ID : 2ALHZNB-1092 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Bluetooth headphones BRAND NAME : N/A MODEL NAME : NB-1092, SSX23P106, NB-1100F, NB-1100, NB-1100FS, NB-1100BF, NB-1300B, NB-1300BF, NB-1300, NB-1050, NB-1060, NB-1069, NB-1090, NB-1090P, NB-1070, NB-1070S, NB-1094, NB-1093, NB-1700, NB-1600, NB-2030, NB-1093, NB-1095, NB-1096, NB-1097, NB-1050, NB-2040 APPLICANT : KO-STAR DEVELOPMENT CO., LTD DATE OF ISSUE : Jun. 09, 2022 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC05177220502FE04 Page 2 of 44 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Jun. 09, 2022 Valid Initial Release Report No.: AGC05177220502FE04 Page 3 of 44 TABLE OF CONTENTS 1. VERIFICATION OF COMPLIANCE .................................................................................................................. 5 2. GENERAL INFORMATION .............................................................................................................................. 6 2.1. PRODUCT DESCRIPTION ........................................................................................................................ 6 2.2. TABLE OF CARRIER FREQUENCYS ....................................................................................................... 6 2.3. RELATED SUBMITTAL(S)/GRANT(S) ....................................................................................................... 7 2.4. TEST METHODOLOGY ............................................................................................................................. 7 2.5. SPECIAL ACCESSORIES .......................................................................................................................... 7 2.6. EQUIPMENT MODIFICATIONS ................................................................................................................. 7 2.7. ANTENNA REQUIREMENT ....................................................................................................................... 7 3. MEASUREMENT UNCERTAINTY ................................................................................................................... 8 4. DESCRIPTION OF TEST MODES ................................................................................................................... 9 5. SYSTEM TEST CONFIGURATION ................................................................................................................ 10 5.1. CONFIGURATION OF TESTED SYSTEM ............................................................................................... 10 5.2. EQUIPMENT USED IN TESTED SYSTEM .............................................................................................. 10 5.3. SUMMARY OF TEST RESULTS .............................................................................................................. 10 6. TEST FACILITY .............................................................................................................................................. 11 7. PEAK OUTPUT POWER ................................................................................................................................ 12 7.1. MEASUREMENT PROCEDURE .............................................................................................................. 12 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 12 7.3. LIMITS AND MEASUREMENT RESULT .................................................................................................. 13 8. BANDWIDTH .................................................................................................................................................. 15 8.1. MEASUREMENT PROCEDURE .............................................................................................................. 15 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 15 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................... 15 9. CONDUCTED SPURIOUS EMISSION........................................................................................................... 19 9.1. MEASUREMENT PROCEDURE .............................................................................................................. 19 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 19 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................... 19 9.4. LIMITS AND MEASUREMENT RESULT .................................................................................................. 19 10. MAXIMUM CONDUCTED OUTPUT POWER SPECTRAL DENSITY ........................................................ 26 10.1. MEASUREMENT PROCEDURE ............................................................................................................ 26 10.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................. 26 10.3. MEASUREMENT EQUIPMENT USED .................................................................................................. 26 10.4. LIMITS AND MEASUREMENT RESULT................................................................................................ 26 11. RADIATED EMISSION ................................................................................................................................. 28 11.1. MEASUREMENT PROCEDURE ............................................................................................................ 28 11.2. TEST SETUP ...................................................................…

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Report No.: AGC05177220502AP01 Page 1 of 2 TEST SETUP PHOTOS RADIATED EMISSION TEST SETUP BELOW 1GHz RADIATED EMISSION TEST SETUP ABOVE 1GHz Report No.: AGC05177220502AP01 Page 2 of 2 AC POWER LINE CONDUCTED TEST SETUP RF CONDUCTED TEST SETUP ****************************************End of Report*************************************