Interface: USB 3.0/2.0/1.1 compatible Sensitivity (at 1KHz) : 105 +/-3 dB Impedance : 32 Ohm +/-15% Speakers: 30 mm diameter, 16u mylar Frequency response: 130 - 20000 Hz Input power: 40 mW nominally, up to 100 mW max Distortions: < 3 % at 1KHz 40mW Microphone: condenser omni-directional; sensitivity:-58 ± 3 dB(0 dB=1V/uBar at 1KHz), -38dB (0 dB=1V/Pa at 1KHz) Net weight: 0.2 kg Cord length: 2 m