Bluetooth version:5.3
Transmission distance: 10m
Battery capacity: 400mAh
Frequency response:20Hz~20kHz
Sensitivity: 105±3db
Speaker diameter: 40mm
Call playback time: about 5-6 hours
Standby time: about 120h
Charging time: about 2h
Built-in microphone: YES
Usage mode:Bluetooth
Charging voltage:5V-1A
Song switching: Support
Volume adjustment: Support
Answer the call/hang up the call: Support
Audio I/O interface:Support