Product information: Color:V3 black blue + adapter cable, V3 black red + adapter cable Frequency range: 20Hz-20KHz Headphone type: Headset Plug diameter: 3.5mm Earplugs/earmuffs material: memory sponge filled with protein leather case Style: Headset Sensitivity: 106±3dB Headset output audio: general Impedance: 16Ω ± 15% Wire Length: 1.9m ± 0.2 Headset cable material: braiding thread Speaker diameter: 50mm