Description Extended Compatibility Compatible with iPhone, Android phones, iPads, Tablets, Portable Music Players, MacBook, Laptop PC, wired connection is also available by inserting the 3.5mm audio cable (included). PLEASE make sure the driver software of receive adapter is fully updated when connected to PC or laptop, and you need a SEPARATE Bluetooth adapter when connected with TV. Notes: 1.The headset needs to be fully charge before first-time use. 2. If the headset is left unused for over two weeks, please recharge it periodically. 3. If you can't connect this headphones to your cell phones or other devices, please ask us for a complete FAQ guidance of Bluetooth Headphones, you can find the solutions finally! Specification Driver diameter: 50mm Impedance: 32Ω Sensitivity: 107dB ±3dB Frequency range:2.4-2.4835G(Hz) Power rating:30MW Mic sensitivity: -58dB ± 3dB Mic frequency range: 30MHMHz-16KHz Play time:About 13 hours Standby:≥180 hours Charging time:About 2-3 hours Charging Current:350mA Compatibility:Cellular phone, Bluetooth device; support remote control of play/pause, previous/next track, volume up and volume down