EC Technology Sweat-proof Wireless Sport Headphones for Smartphones and Bluetooth Devices - Green Latest Wireless Bluetooth 4.1 Technology with A2DP stereo music and AptX pure, clear sound, ideal for high quality music while running, jogging, cycling, skating, etc CVC 6.0 smart noise reduction - improve call quality, You can begin enjoying CD quality stereo sound instantly. Ergonomical earplugs and unique designed ear cannals provides steady performance when you are enjoying sports. Built-in battery allows you to enjoy up to 6 Hours Talking/Playing Time and 175 hours standby. Universally compatible with iPhone, Android, Windows, blackberry and all smart phones with Bluetooth, as well as other Bluetooth enabled devices.