New Bluetooth 4.0 headphone - Sports Stereo HiFi - Built Micphone - Retail package Bluetooth 4.0 and A2DP technology Stereo Earbuds, Enjoy your Music Tangle Free In-Line Microphone and Controls for Music,Volume skip tracks and adjust volume Built-in microphone, answer phone calls easy, Digital noise reduction for call clarity Ultralight, comfortable, easy-to-wear. 33 feet working distance, Sport headphone, Up to 5 Hours of Listening and Talk Time Compatible with most Bluetooth smartphones, Tablets and MP3 players