Etekcity Roverbeats Wireless Bluetooth Earphones: Built-in Microphone,Lightweight,NFC,v4.1,for Sports Running Jogging Walking Hiking Gym Exercise(Black) Wide wireless range of up to 10 meters (32.8 feet) with high quality audio playback for music enjoyment and phone call audio playback. Supported with bluetooth version 4.1; backwards compatible. NFC capable, easy to pair and features two-link capability for multiple device connection. Includes built-in mic for phone call operation and full and function direct control. Take calls and skip songs without having to pull out your device. Rapid full 2 hour charge time and low battery indication for convenience and simplicity. The comfortable and lightweight design makes the earphones ideal for workout, running and cleaning around the house.