Zalman ZM-HPS310 Black

 Features Clear and powerful Hi-Fi surround sound Virtual 7.1 surround sound Adjustable headband 50mm neodymium drivers Spectrum RGB Flexible mic Comfortable memory foam earpads Lightweight   Technical specifications   Dimension: 187 (W) x 201 (H) x 91 (L) mm Interface: USB Weight: 243g (without cable) Cable length and type: 2.2m / Braided with volume controller Color: Black   Speaker Driver unit size: ø50mm Impendance: 32Ω ± 15% Operation power (max): 30mW Sensitivity: 106 ± 3dB Frequency response: 20~20KHZ   Microphone Microphone size: ø6.0*2.7mm Sensitivity: -42 ± 3dB Type of mic: omni directional S/N ratio: 58dB Impendance: ≤32KΩ