"Material: ABS + PC
Bluetooth version/chipset: V5.4/AD7003D4
Supported protocols: A2DP, AVRCP, HSP, HFP
Transmission distance: 10M
Working voltage: 5V-300mA
Resistance: 32Ω ± 10%
Speaker power: 2mW
erabud/charging box Battery (mAh): 30mAh/300mAh
Charging time: About 1.5 hours
Call: About 4 hours
Music playback: About 6 hours
Standby: about 350 H