Wear freely from side to side siri wake up voice assistant with one click Automatic connection incoming call 15 hours of listening to music on headphones Charging time: 2 hours Bluetooth version: v5.0 Battery capacity: 170mAh Transmission range: 10 meters Colour: black Material: ABS Size: 69 * 17 * 11.5MM Package Contents: 1 x headphones 1 x manual 1 x charging cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.