1. Open the lid to connect (pop-up animation when connecting with iPhone system). 2. 3 real batteries for iPhone (2 earbuds and charging case). 3. In-ear sensor, supports noise reduction and transparent mode. 4. No LED on the earbuds (the LED on the charging case will work when the case is in the charging case to charge the earbuds). 5. Transmission distance 10 meters, supports precise positioning. 6. Automatic power on and off. 7. Can be used separately or together. 8. Bluetooth 5.0. 9. Now you can change the name of the Bluetooth device and tap control (only for iPhone system 13.1 or later). Connecting devices: 1. Open the lid of the box and turn on Bluetooth on the device, the pop-up function will work. You will see a notification asking you to press the button on the back of the charging case. 2. Long press (about 4 seconds) the button and you will see the white LED flashing. The earphones will automatically connect with the phone.