Bfeatures: Equipped withluetooth chip to ensure sound quality and the highest fidelity of headset. 2. Portable storage box, easy to carry and good protection. Please note: this box has no power pack function. 3. Ultra light and comfortable design, ergonomic earplugs and earrings, even if worn for a long time, will not bring heavy feeling. The 180 degree turning arm can adjust the angle and install the earphone on the right or left ear. 4. Compatible with mainstream smart phones such as iPhone, Samsung, Huawei, LG, HTC, Android, etc., working time up to 8 hours, standby time 240 hours, 1.5 hours fast charging, 10 meters / 30 feet range. How to connect to a phone 1. When the Bluetooth headset is off, press and hold MFB for about 3 seconds until the headset indicator lights flash red and blue, and then press TL enter to enter the search status. 2. Turn on the Bluetooth function of mobile phone, click "search Bluetooth device" to search for headset, and click "TL connection". Package content: 1 * Bluetooth headset 1 * USB charging 1 * user manual