Advanced compatibility: Compatible with Android phones, tablets, portable music players, MacBook, laptop PC, cable connection is also by inserting the 3.5mm audio cable (included). Please make sure the driver software of the receiver adapter. is fully updated when connected to a PC or laptop, and you need a separate Bluetooth adapter when connected to the TV. Notes: 1. The headset must be fully charged before first use. 2. If the headset is not used for more than two weeks, please charge it regularly. 3. If you can't connect this headphone to your phones or other devices, please ask us for a full FAQ guide for Bluetooth headphones, you can finally find the solutions! Specifications: Driver diameter: 50 mm. Impedance: 32Ω. Sensitivity: 107 dB ± 3 dB. Frequency range: 2.4-2.4835G (Hz). Power: 30 MW. Mic sensitivity: -58 dB ± 3 dB. Mic frequency range: 30 MHz-16 kHz. Playing time: approx. 13 hours. Standby: ≥180 hours. Charging time: approx. 2 - 3 hours. Charging current: 350 mA. Compatibility: Mobile phone, Bluetooth device; supports remote control of play/pause, previous/next track, volume and volume downwards. Box contents: 1 x wireless headphones. 1 x audio cable with microphone and volume control. 1 x USB cable and 1 x manual * card.