Automatic pairing:1. Remove the left and right (LR) headphones from the charging case. The ear will automatically open and connect2. Turn on the phone Bluetooth search and click on the main headset name to pair.3. When used again, they will automatically connect to your Bluetooth device True wireless stereo, HIFI sound. Both the left and right ears have full Bluetooth headset functionality and can be used individually or in pairs. Dual mode Bluetooth 5.0, ultra low power consumption. Bluetooth transmission distance: 10 meters barrier-free. Listening to song time: about 4-5 hours Battery capacity (charge box): Built-in 2000mAh large capacity battery. Can charge headphones 25   Times Standby time: about 120 hours. Noise reduction technology: CVC8.0. Package Included:2 * for wireless earbuds (left and right)1 * charging box1 * Micro-USB cable1 * User Manual4 * Spare earplug a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a