CLiPtec BMH519 Dynamic Stereo Multimedia Headset 'MobiWave' are made specifically for active, daily use, to power you forward by delivering extraordinary comfort, style and an immersive listening experience. The attached microphone delivers crisp conversations on Skype call, gaming chatting and also music listening that is optimized for a wide range of Ultrabook, smartphones and tablets. Specification Speaker Driver Diameter 40 mm Impedance 32Ω Frequency Response 20Hz-20KHz Sensitivity (S.P.L.) 98dB ± 3dB Cord Length ≥ 1.5 m Audio Plug 3.5 mm Audio Jack (4 Poles) Net Weight 200 g Microphone Mic Dimension Ø6.0x1.5 mm Impedance ≤2.2k Ω Sensitivity (S.P.L.) -45dB ± 3dB