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TWS Bluetooth 5.0 Earphone Wireless Earbuds 3D Stereo Headset w/Mic (Black)

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Bluetooth chip: RELTEK RTL Jerry 6916
Bluetooth Version: V5.0
Wearing style: in-ear style
Functional Uses: Sports, Vehicle, Business, Listening
Vocal Track System: Stereo
Working frequency: 2.402~2.480GHz
Support protocol: HSP/HFP/A2DP/AVRCP
Transmission distance: 10 meters
Transmission power: Class2
Audio signal-to-noise ratio: 98dB
Response frequency: 20-20000Hz
Charging input standard: DC 5V/0.5-1A
Listening time: about 3-4 hours
Call time: about 3-4 hours
Standby time: about 100 hours
Battery: Earphone: 3.7V lithium battery, 55mAh, model: 501215
Charging box: 3.7V lithium battery, 450 mAh, model: 502535
Charging time: headset: 30 minutes, charging box: 1 ~ 2 hours
Headphone size: 22.1*17.1*25.6mm/0.87*0.67*1''
Charging box size: 58*33*43.5mm/2.28*1.29*1.71''
Horn diameter: 8mm
Horn impedance: 16ohm
Horn Sensitivity: 94db±3db
Rated power: 10 mW
Microphone: 4026
Microphone Frequency Response Range: 100Hz-8000Hz
Sensitivity of microphone: -42db±3db
Net weight: 4g
Gross weight: 109g
Packaging size: 79*79*53mm/3.11*3.11*2.08''
Color: Black

Please allow 1-3mm differs due to manual measurement.
Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understand.

2 X Bluetooth 5.0 Earphones
1 X Earmuffs (S/M/L three pairs of earcaps on headphones)
1 X Charging Cable
1 X User Manual