Bluetooth version: V5.0
Bluetooth protocol: A2DP / AVRCP / HSP
Bluetooth frequency: 2.4GHz
Rated voltage: DC 3.7V
Built-in lithium battery: 2200mAh / 3000mAh
Speaker specifications: 52mm /4Ω/ 5W
Maximum output power: 5W
Charging voltage: DV-5V / 500mA
Charging time: 3±0.5 hours