Excellent sound quality headset with Bluetooth V4.1+EDR for best stereo sound and superb bass sound. Built-in high-performance rechargeable Polymer battery allows a minimum of 3 hours of playtime. Easy and fast pairing with smartphones, tablets, and other Bluetooth enabled devices. The two earpieces can be used simultaneously or separately based on your needs. Without the wire, the earphones can be easily carried on and stored. Full compatibility with all Bluetooth-enabled devices.