Bluetooth version: Jerry Bluetooth V4.2 Transmission distance:10m Usage time: 4 hours standby time: 5-8 minutes automaticshutdown. Battery: 90mAh rechargeable lithium battery features:TF card insertion, volume adjustment, song switching, incomingcall answering, incoming call rejection, phone hang-up, Bluetoothplaying, phone replay, Bluetooth reconnection, voice prompt,power display, incoming telegram signal, intelligent shutdown,and broadcast in pure English.Full set of accessories include:USB charging cable in Chinese and English instructions neutralcolor box, thread buckle, clip, transparent silicone color:black, red, blue and brown.