AUSDOM S940 Anti-shedding Bluetooth 4.1 Sports Wireless Exercise Earbuds Extra Bass Earbud Headphones with Microphone for Iphone 6s,Samsung Galaxy Key operation Build-in microphone and hands-free, Portable carrying case for travelling. Bluetooth 4.1 high-quality and lower power-consumption chip,compatible with all Bluetooth Enabled Devices with BT V2.1 or above Over 11 hours of continuous calling and playing time, 2200 hours standby,15m Bluetooth indoor commission,7m for outdoor Drive-by-wire function make it more easy to control the voice volume and music playing. Including 3different size of anti-shedding silicone earmuffs super comfortable, perfect for working out or any other activity.