Phone case Compatible IP X,Fourcase Bluetooth Earphones Wired Earbuds Headset with Noise Canceling Sweatproof Compatible with IP XS/XR/ XS Mas,IP 7/8/X/7 Plus/8 Plus How to Use Earbuds As this earphone is a Bluetooth connectivity version . You need to open the Bluetooth on your Phone , connect your earphone with your Phone, and click the device on the other devices on your Bluetooth interface manually . (It will connect automatically the next time when you connect your earphone with your Phone in few seconds If your Bluetooth is open ) Volume Control The cord was built in a in-line controller and a high quality hands-free microphone, the controller was designed to play / pause music / next track / previous track / answer phone calls / hang up phone calls. High performance sound quality Super dynamic deep bass high resolution treble and crisp powerful sound. It has perfect stereo sound quality, enjoy full listening comfort with soft, bring you the perfect audio enjoyment. Ergonomic design Universal headset shape match most people's ears. Ergonomic design allows for ultimate wearing comfort, you wont feel hurt even for an whole day wearing. Design for Sport Professionally Designed for music listening requirement In running jogging weight lifting walking and gym training. Universal headset shape match most people's ears. So they will not fall or break even during intense outworks.