Transmission distance: 10m
Sensitivity: 105±3db
Speaker diameter: 40mm
Battery capacity: 400mAh
Playing time: about 10h
Standby time: about 120h
Charging time: about 2h
Built-in microphone: YES
TF Card:Support
Charging port: USB
Song switching: Support (short press the function key)
Volume adjustment: Support (long press the function key)
Answer the call/hang up the call: Support (short press the function key)
Audio I/O interface:Support