CAMTOA Bluetooth Headphone V4.0 Neckband Wireless Stereo Sports Headphone Noise Cancelling Headset Earbud Sweatproof Headsets Earphone for Running with Mic Lightweight Bluetooth Earbuds with a few adjustment on the ears, Behind-Ear Streamline Flexible Soft Texture Design ensure 100% Comfortable and Stay on ears,Bluetooth Wireless Headphones perfect fit for running/cycling/workout/gym One-Button design make wireless earbuds simple to control music and calls. It has an play/pause/answer/hangup button and a multifunction button. The multifunction button cycles through all the volume levels with one button Headphones built-in HD Mic with CVC6.0 noise cancellation, ensure wireless headphones has really nice bass and a good overall tone. Bluetooth Earphones sound is crystal clear with no hissing during noisy environment like running Bluetooth Headset Adopt Latest Bluetooth V4.0 compatible with 99% bluetooth devices,like iPhone 6S 6S Plus, Sumsang Phones and Android phones. Easy and fast pairing