● BT Specification：Bluetooth V5.3
● BT Profiles Supported：A2DP, AVRCP, HFP, HSP.
● Effective range：About 10 m
● Speaker diameter：30mm
● Impedance：32±4 Ohm
● Sensitivity：82±3dB at 1KHz
● Frequency Range：20Hz – 20KHz
● Rechargeable Battery：200mAh
● Working Voltage：3.7V
● Charging socket : Micro (C type)
● Play time :11hours at 80% volume
● Charging Time: About 2 hours