Fourcase Bluetooth Earphones Eaubuds Compatible iP X, Headphone Wired Headset with Microphone & Remote Control Noise Canceling Sweatproof Compatible iP XS/XR/XS Mas,IP 7/8/X/7 Plus/8 Plus Built in Mic&Volume]Multifunctional button to control power on/off, answer/hang up call, play/pause music/video etc. Fourcase Bluetooth headphone built in hands-free microphone. Giving you hand-free voice experience. [Quality headset and Bluetooth V4.1] Bluetooth V4.1 for seamless syncing to your favorite devices. Delivers Premium Sound with fine-tuned acoustics that balance strong bass, soaring Highs, and clear mids. [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. [Sweat Resistant] Built for your active lifestyle - these earbuds are rated IPX Level 6 and can with stand dripping sweat. Great for your active lifestyle like running, jogging, cycling, driving, camping, hiking, gym exercise and other outdoor sports. [How to Use Earbuds] As this earphone is a Bluetooth connectivity version,you need to open the Bluetooth on your phone ,connect with your phone, and click Earphone 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)