HOW TO PAIR?  For Twins ears pair connection:  1. Pick earbuds up from charging case, then will be power on automatically (Led: left earbud white-blue flash. ) 2. Turn on your device bluetooth function, search ''T1'' and to be connected  3. They will automatically connect to your bluetooth device when you use again  4. This wireless earbuds also can be single connection.   Battery Capacity(Charging case): Internal 500mAh rechargeable battery Battery Capacity(earbud): Internal 50 mAh rechargeable battery Earbud Size and weight: 18 mm,4g Working Range: About 10M/35 feet Wireless Version: Dual-mode Bluetooth V5.0, Ultra low power consumption Standby time: About 150 hours Working Time:  About 3-5 hours( single ) ;  About 2-3 hours( paired ) ; support incoming call number, IOS system power display   Wireless Earbuds Fuctions One button control easily to turn on/off, play/pause/switch music, hands free calling to driving, working, meeting, running Wireless earbuds support to connect any device with Bluetooth function, for iphone x, iphone 8 7 6 plus, 6s, SE, 5S, iWatch, windows nokia xiaomi laptop pc zte lg htc huawei s8 s7 s6 galaxy samsung ipod ipad   Package Include   1* Pair of Wireless Earbuds (Left & Right) 1* Charging Case 1* Micro-USB Cable 1* User Manual 2* Ear Tips NOTE: ​Please use the 5V 1A adapter to charge, otherwise it may damage the earphones.