Features:Bluetooth，Calling, TF, AUX, USB

BT Version:V4.2+EDR

Working Time:Up to 3 hours

Charging Time:3-4 hours

Receiver Distance:Up to 10 meters

Speaker:40mm

Power amplifier specifications:4Ω/ 3W

Battery Specification:400MAH

Product Size:116*80*45mm

Frequency response range:100Hz-20KHz

Color:Black, Red, Blue