Yu Yi Ling IBHT Wireless Earphone

Color: black red, black gold Bluetooth version: 4.1 + EDR Processor: CSR8635 Style: collar Number of batteries: 1 Each battery capacity: 170 mAh Total battery capacity: 170 mAh Music time: 15 hours Talk time: 20 hours Charging time: 2 hours Standby time: 600 hours Noise reduction version: DSP and CVC6.0 Power on and off "switch to on / off Switch songs "Press Next / Prev Adjust volume "Press volume +/- Play and pause "independent buttons "Answer and hang up" independent button Reject call "Press the answer button for 2 seconds Redial last number "press the answer key twice Working distance "8-10 meters 1 * Headphone 1 * USB charger cable 1 * Chinese and English manual 4 * earmuffs