Material:Plastic Battery life up to[hours]:4.5 Sound Isolating:YES Category:Earphones & Headphones Earcups Type:Semi-open Number Of Drivers:2 Charging Method:Charging case Headphone Pads Material:Silicone Magnet Type:Neodymium Impedance Range:from 33 to 100 Ω Bluetooth Version:5.0 Package List:User ..