Material: ABS Product color: black gray, black green, black red Bluetooth version: 4.1 Chip solution: chuangjie 2008 Mode of wearing: hanging ears Audio track: true stereo Headphone battery: 170 ma Product features: super long standby, 17 hours music play, 18 hours or so voice calls, ear-hanging mode, hard to shake, apple and android phones support battery display, true stereo, only 12g headset, wearing comfort for a long time...