Sunvito Mini Lightweight Sport Bluetooth 4.0 Headphone Headset Secure Fit Wireless Earbuds(CVC Noice Cancelling,Mic for Hands-Free Calling,Stereo) (Black) Advanced CSR Bluetooth 4.0 technology with CVC Noice Cancelling ensures professional,high-fidelity and stereo sound quality and clear calls. Compact and lightweight,incredibly Comfortable, Secure Fit Bluetooth Earbuds- The uniquely designed ear hooks form around your ears, so you don't have to readjust them endlessly. Designed to stay in place and not fall out. Can be connected 2 bluetooth devices at the same time,you will never miss any phone calls if you have 2 phone calls. Compatible with most Bluetooth-enabled Smart phones. Such as iPhone6 6Plus 5S,iPad,iPod Touch,Samsung Galaxy S5 S4 S3,HTC One Strong Wireless Signal,distance is never a problem.You can enjoy skip-free music in a 10-meter working distance. Rechargeable Li-Polymer Battery for long user time: Play/music time up to 5-8H,standby time up to 100H.Charging time: About 2 hours.