Specifications:
Bluetooth version: V5.0
Support mobile phone, notebook with blutooth devices
Bluetooth protocol: HFPV1.5 and HSPV1.1
Working temperature: -20－ 60 ℃
*Working voltage：DC 4V
*Battery volume：200mAH
*Talk time：12 hours
*Standby time：36 hours
*Charging adaptor：DC 5V,300mA
*Frequency：2404-2479MHZ
*Tramsit range：10M
*Charging time：4 hours
Colors：6 colors（Black/white/Yellow/Red/Blue/Pink)