RAPOO Bluetooth Headphones Wireless with Hidden Mic, Headphones Over Ear, Stereo Headset with Comfortable Ear Pads, Rechargeable Batteries, 16 Hours Play for PC, Computer, Tablets and Phones-Black 1. Bluetooth 4.1 wireless audio transmission 2. Connect Two Devices Simultaneously 3. Support Voice Calls Function 4. 16 Hours of continuous play 5. Compatible with Windows or Mac OS computer, tablets and smart phones with Bluetooth function