TWS Bluetooth 5.0 Earphone Wireless Earbuds 3D Stereo Headset w/Mic (Black, 501 Original

Specification:Bluetooth chip: RELTEK RTL Jerry 6916Bluetooth Version: V5.0Wearing style: in-ear styleFunctional Uses: Sports, Vehicle, Business, ListeningVocal Track System: StereoWorking frequency: 2.402~2.480GHzSupport protocol: HSP/HFP/A2DP/AVRCPTransmission distance: 10 metersTransmission power: Class2Audio signal-to-noise ratio: 98dBResponse frequency: 20-20000HzCharging input standard: DC 5V/0.5-1AListening time: about 3-4 hoursCall time: about 3-4 hoursStandby time: about 100 hoursBattery: Earphone: 3.7V lithium battery, 55mAh, model: 501215Charging box: 3.7V lithium battery, 450 mAh, model: 502535Charging time: headset: 30 minutes, charging box: 1 ~ 2 hoursHeadphone 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: 8mmHorn impedance: 16ohmHorn Sensitivity: 94db±3dbRated power: 10 mWMicrophone: 4026Microphone Frequency Response Range: 100Hz-8000HzSensitivity of microphone: -42db±3dbNet weight: 4gGross weight: 109gPackaging size: 79*79*53mm/3.11*3.11*2.08''Color: BlackNote: 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 Earphones1 X Earmuffs (S/M/L three pairs of earcaps on headphones)1 X Charging Cable1 X User Manual