Karnotech DACOM Sports Bluetooth Wireless Stereo hands-free Headset Earbud Headphone with Mic for iPhone, iPad, Samsung, HTC, Blackberry, Nokia, etc Breakthrough Bluetooth 4.1 technology: High-fidelity, NFC, Strong signal, Fast transfer speech, and Low power consumption Enjoy clear and surround stereo music and take call, skip tracks, control volume with a quick tap of your headset. Wireless voice chat on MSN, SKYPE Durability. Up to 8 hrs play & talk time and 180 hrs standby time, never worry this headset will be out of juice in your daily life Ergonomics, considerate and sweatproof design for comfort and anti-fatigue. A behind-the-ear shape design, locks in- won't fall out, enjoy freedom and move freely. Universal device compatibility: compatible with most Bluetooth devices, and reduce white noise. Indicate battery status in IOS system.