Bluetooth version: 4.1
speaker: 2ohm 8w x 2 2ohm 5w x 2
transmission distance: about 10m
frequency: 20hz-20khz
signal to noise ratio: 85db and more
working voltage: 3.7v
distortion: less than 1pct
charging voltage: dc5v
charging interface: micro usb
call duration: about 8h
music playback: about 8h
standby time: 30 days and more
charging time: about 8h (different charger specifications time)
usb output: 5v 2.3a