Vocalism Principle: Dynamic Control Button: Yes Active Noise-Cancellation: Yes Communication: Wired Volume Control: Yes Sensitivity: 80±5bBdB Is wireless: Yes Line Length: 0.8mm Support APP: No Number Of Drivers: 2 Plug Type: Line Type Impedance Range: up to 32 Ω Connectors: 3.5mm Earcups Type: Semi-open Headphone Pads Material: Memory Foam Bluetooth Version: 4.2 Codecs: AAC Support Memory Card: No Driver Diameter: 40mm Resistance: 36ΩΩ Waterproof: No Frequency Response Range: 20 - 20000Hz Total Harmonic Distortion: 1<1%% With Microphone: Yes Charging Method: CABLE Magnet Type: Neodymium color: golden,black,sliver&golden bluetooth version: V4.2 battery: 300mah work time: about 10h charge time: about 2-3h active noise cancelling: Yes,about -20dB
