Bluetooth Headphones with Build-in Mic, InnFast Bluetooth V4.1 Wireless Stereo In-Ear?Headset Supports Noise-Cancellation Compatible with iPhone, iPad,Samsung,Other Devices-Black Latest Bluetooth V4.1 and CSR 8645 boost the signal 2 times, fast and easy pairing with 99% Bluetooth-enabled devices and Apps with lower power consumption and superior performance Built in HD microphone with CVC6.0 noise cancellation and audio enhancement technology give Bluetooth earphones Hi-Fi stereo sound Built-in ceramic antenna ensures stable and strong signal even when you are jogging or doing other exercise and gives you high fidelity and clear audio experience The behind-the-neck wireless design and the control keys free you from the restrain of cables while doing exercise and enable you to easily control music and phone calls Up to about 5-hour playtime after one full charge, build-in rechargeable Li-battery for quick easy charging. Power meter displayed on iPhone, iPod touch, iPod nano, iPad, iPad mini, MacBook or iMac