Features:- Special Design: ear piece ergonomic angle is designed to contour to your ear shape which will allow you to enjoy the real music element and nice fit to your ear canal. Earbud front tip can be 360 degree rotated according to your ear size and shape to avoid falling.- Sport in-ear earbuds built-in magnets make it easy to wear, like a necklace wear around your neck, a very convenient way to carry around neck.- Multi-points connection function: allow the earphone to connect to two devices at the same time.- bluetooth earbuds work for all cellphones, tablets and music players. Latest bluetooth 4.1 technology; easy and fast pairing with smartphones, tablets and other bluetooth enabled music devices; High quality process provides pure, CD-like sound for compatible devices.Specification:Model: BT313Optional Color: Black, White, Red.Wearing Type: In-earProduct Size: 53.5*13.5*10.5mmMicrophone: YesWired Control: Yesbluetooth Version: V4.1Transmission Distance: 10mBattery Capacity: 80mAhCharging Time: About 2hTalk Time (h): 4-5hMusic Time (h): 4-5hStandby Time (h): 130hPackage Included:1* Sport Magnetic Wireless bluetooth Earphone1* USB Charging Cable1* User Manual