"Bluetooth version: Bluetooth 4.1
Battery Capacity：3.7V,25mAh
Sensutuvity:-92dBm
Profile support: HSP,HFP,A2DP,AVRCP
Frequency range:2.40GHz-2.48GHz
Talking time ：1.5Hours
Charge time ：about 1.5hours
Input:DC 12V-28V
USE output 1:DC 5V/1.0A
USE output 2:DC 5V/2.1A
Car charger:39*78mm Gross weight:23g
Work temperature:-10-50°C Headest size:20*23mm"
