Distance 10M
Battery Volume 300mAH
Loud Speaker Size 40mm
Version V4.1
Charging Voltage DC5V
Working Time Music 6-8 h , Call 8-10 H
Working Voltage DC3.7V
Battery Capacity 50Mah
Frequency Range 20Hz - 20KHz
Speaker Impedance 32 Ohm
Loud Speaker Size 40mm
Rated Power 100mW
Microphone Built In