New Sport Wireless Bluetooth headset Stereo Earbuds Headphone with In-Line Microphone, Built in Li-battery, Bluetooth 4.0 with A2DP technology,Noise Cancellation Technology, (Red) 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