Etre Jeune BO-N1557 Earbuds Headphones Bluetooth, Earphone Stereo Sound + Built-In Microphone + Volume Control, Yellow Bluetooth connectivity: you need to open the Bluetooth on your phone to connect with this headphones the first time you use it. It will connect automatically The next time when you connect your earphone with your phone in few seconds If your Bluetooth is open. How to use: as this Earphone is a Bluetooth connectivity version. Firstly, you need to plug the headphones into the phone, secondly, open the Bluetooth on your phone, thirdly, find the earphone device and click it, It will connect and work at last. Wide COMPATIBILITY: compatible for iPhone XS XTR x 8/8Plus 7/7Plus. And it can support all the iOS versions, without worries about the iOS version upgrade problems. Support phone call: built in hands-free microphone and remote control, allow you to take call, play, pause, volume up and down. High-end technology: designed with solid sound-insulating material, reduces external noise while minimizing the sound leakage, giving you clear sound.