Bluetooth Headphones, ROKER Bluetooth V4.1 Wireless Stereo Sports Earbuds Earphones Headset Headphone for Running Gym Exercise with Microphone Latest Wireless Bluetooth 4.1 Technology with A2DP stereo music and AptX pure, clear sound, ideal for high quality music while running, jogging, cycling, skating, etc Built-in rechargeable Lithium battery lasts up to 4.5 hours of talk / play time or 175 hours standby, universally compatible with most Bluetooth-enabled phones. Works with iPhone, iPad, Android and Windows Smartphones tablets and other Bluetooth devices Good noise isolation to create the optimal environment for listening to your favorite tunes, built-in microphone with noise cancellation for clear calling and friends chatting Sweat-proof, light weight and ergonomic design to enhance your comfort; comes with interchangeable earbuds and ear hooks for secure and personal fit when walking or exercising Superbly comfortable rubber adapters and unique design ensure that earphones always stay in place no matter your level of activity. 3 different sizes of ultra-comfortable earbuds ensure you get that perfect fit.