MT-HP020 model Color: Black Speaker: φ50mm Size: 185 x 110 x 210 mm; sensitivity: 120 ± 3 dB 290±5g in weight 32Ω impedance, 10~20,000 Hz frequency response, and an Omnidirectional microphone Mic sensitivity: 2.4±0.01m Mic unit diameter: φ6.0±5.0mm Interface: Ά3.5mm stereo jack and 290±5g USB cable