Over head headphones | Adjustable headband | Minimum Frequency Range: 20~20000 Hz | Impedance: 32 ? | Sensitivity: 98 +- 3dB | Mic Sensitivity: -38 +- 3dB. Wireless Connectivity: 5.0 Bluetooth; 2.4GHz via USB dongle | Surround sound: 3D stereo 7.1 surround sound | Play Time & Music Time (Battery life): 100 Hours. 3 Tyoes of Connection Modes: 2.4 GHz Wireless mode; Bluetooth mode; Wired mode (3.5mm audio jack) | Deep Bass Thrilling Sound with 50 MM Drivers. Uni-directional Mic Dimension: ø6.0 x 2.7mm | USB-C charging (4-6 hours) | <3% Battery Voice Alert. Multi-Platform Support with Wired and Wireless| Widely Compatible.