Earphones bluetooth A17 with magnet microphone HD Black Celebrat          

Specifications:

Bluetooth version: 5.0
Transmission distance: <=10m
Best working distance: >=6
Battery capacity: 110mAh/3.7V
Microphone sensitivity: -42dB±2dB
Working Frequency: 2402-2480MHZ
Drive unit: 14.2mm
Impedance: 32Ω±15%
Sensitivity: 97dB±3dB
Frequency response: 20 Hz-10KHz
Music time: ~8 hours (70% volume)
Call time: ~7 hours (90% volume)
Standby time: ~250 hours
Charging time: ~2 hours
Input: Micro USB 5V/500mA