Driver Unit 50mm Speaker Frequency Response 20-20KHz Speaker Sensitivity 110dB Speaker Impedance 32±15% Microphone Sensitivity -38±2dB Microphone Directivity Omni-Directional Microphone Impedance 2.2K±30% Plug Type USB 2.0 Cable Length ±2m PACKAGING INFO: Box size: 200*115*212.024mm N.W: 317.4g G.W: 958.9g Carton size: 52*45*45cm N.W: 19.5kg G.W: 20.5kg Qty/ctn: 20pcs