BT5.1
Bluetooth distance：10m
Frequency Response：20HZ-20KHz
Microphone sensitivity：-85dB
Earphone：3.7V/2*50mAh
Charging case：3.7V/300mAh
Charging bin to the earphone charging times： 2.5 times
Earphone charging time：1 hour
Charging time of charging bin：1.5 hour
Playtime：6 hours
Weight of single earphone：4.5g
Weight of  charging bin：27g
Color：Black/Red//Black/Gray//Black