Shell material: zinc alloy + metal mesh cover Microphone use: general purpose notebook and desktop computer Product size (diameter * thickness): D 70mm * H 15mm Product weight (without packaging): 137g Sensitivity: -40+/-3dB Frequency response range: 100-16000HZ Maximum sound pressure ratio: 110db Signal to noise ratio: >60db Pointing characteristics: omni-directional/non-directional Pickup distance: 2 meters recommended, up to 3 meters pickup radius Interface type: USB 2.0 Cable length: about 2 meters