These wireless headphones are comfortable to wear and provide amazing sound quality. Pair via Bluetooth to your Smartphone, Tablet, or computer so you are free from getting tangled in cables, and take phone calls using the integrated microphone. The rechargeable battery provides up to 18 hours of playback time or 14 hours of talk time. Simply connect to a USB power source to recharge. When not in use, they fold up to take up less space. Includes 3.5mm to 3.5mm auxiliary cable and USB charging cable. Features: Bluetooth Wireless Technology Rechargeable Battery In-Built Microphone 3.5mm Auxiliary Jack Specifications Impedance rating : 32.0 Bluetooth Version : V5.0 Bluetooth Range : 10.0m Width : 200.0mm Height : 180.0mm Depth : 85.0mm Weight : 230.0g Shape : Lithium Rechargeable Battery Cell/Pack Type : Lithium Ion Voltage : 3.7V Capacity : 500.0m - Ah Battery quantity : 1.0pc Batteries included : true Run time : 13.0hr, 18.0hr Run time conditions : Up to 14 Hours Talk Time USB rechargeable : true USB recharge time : 1.5hr, 2.0hr USB Charge Connection : USB 3 Micro Type B USB Voltage Input : 5.0V, 5.0V USB Input Current : 500.0m - A, 500.0m - A Style of Headphone : Headphones Audio Channels : Stereo Driver Diameter : 40.0mm Input Connection : 3.5mm Mono Frequency Range : 20.0Hz, 20.0k - Hz Sensitivity : 96.0d - B