earbuds, microphone earphones stereo headphones noiseisolating headset fit compatible with headphones quanqiangtong <b>★our promise to you!★ </b><br><br> all quanqiangtong products are built to the highest quality standards,focuses on creating the best headphone experience. and we stand behind our products with 30 day money back guarantee and a full 1 year manufacturer's warranty.<br><br> <b>earbuds,microphone earphones stereo headphones noiseisolating headset fit compatible with xs/xr/xs max (1pack) </b><br><br> <b>how to use: </b><br><br> step 1:click the setting,turn on the bluetooth<br> step 2:plug into the phone(a window pops up)<br> step 3:click the "connect"<br><br> <b>●how to use smart button in-line control:</b><br><br> ❶ press middle multifunction button: answer/end phone calls<br> ❷ long press middle button : reject phone calls<br> ❸ press once middle button : play/pause music<br> ❹ press twice: next track<br> ❺ press three: previous track<br><br> <b>connect devices:</b><br><br> fourcase headphones can work seamlessly with your phone 7,8, tablets, bluetooth-enabled music players and any device with bluetooth connection. never miss important calls or messages.<br><br> <b>note:</b><br><br> ➣this headphones own bluetooth function, turn on the bluetooth before using.<br> ➣this bluetooth function will be connected automatically when you using at next time or in the future.