ANG &reg;Wireless Smart Bluetooth Headphones, 4.0 Noice-concelling Sweatproof Sports Stereo Earphones for Iphone,Ipad,Samsung,or Other Bluetooth Enabled Devices (black) Lastest bluetooth 4.0 technology: pairing with smartphones,tablets and other Bluetooth devices easily and faster;connecting to 2 phones at the same time, you will not miss any important calls. Magnet attraction design and sweat proof: hands-free, you can hang it like a necklace around your neck,this sport headphone will let you enjoy music when running, gym, sports & exercise and other activities. CVC noise cancellation 6.0 technology: with steady Bluetooth signal,you can get high-quality, hands-free phone conversation even on the street or inside shopping mall. Long-lasting enjoyment of music:about 6 hours talking/music time,200 hours standby with a single charge(1 hour charging time), so you have less time charging and more time doing. Sleek and comfortable design avoid any pain after hours of wearing and 3 ear tips of different size fit your ear