It is suitable for full-speed operation in compliance with USB 2.0 and USB o device class specifications. The microphone supports USB suspend/resume mode with a recording sampling rate of 48kHz. In recording only mode, the sampling rate supports 8kHz, 16kHz, 22.05kHz, 41kHz, and 48kHz. Supports +20dB microphone enhancement (enabled by default) for AGC, compatible with default USB o driver control. Compatible with Windows 2000/Windows XP/Windows 7/OS X, no additional driver required. The mini USB microphone is made of high-quality ABS material, compact, easy to carry and store. Item Type: Mini USB Microphone Model: Hy-302 Material: ABS Product Color: As Shown in Pictures Product Weight: Approx. 69g Sensitivity: -58dB ± 1dB Impedance: ≤ 2.2kΩ Operating Voltage: 2V