LG Electronics Tone Pro HBS-770 Stereo Bluetooth Headphones - Black Type: Bluetooth Stereo Headset Ear Coupling: Behind the Neck Talk Time: Up to 16 hour(s) Music Time: Up to 10.5 hour(s) Standby Time: Up to 720 hour(s) Charge Time: Less than 2 hour(s) Operating Range: 33 Feet Bluetooth Version: 4.1