Bluetooth version: Bluetooth 5.0 Transmission distance: outdoor straight line distance 10-15 meters Battery capacity: polymer lithium battery Function: fast charging, HD call Listening to music time: 2.5 hours Up and down music / pause playback Call time: 2 hours Standby time: 130 hours Charging time: 1-2 hours Product specifications: full set weight: 131g Packing specification: 10*10*3.3cm Standard: pair of headphones + headset charging box + Lighting interface charging cable + manual + box + silicone protective cover + hook