* Compliant with USB specifications 2.0 * Compliant with USB Audio Device Class Specification v1.0 * Plug and play, no additional driver needed * Stereo speakers directly supported * 16-bit audio DAC amplifier * 16-bit ADC input with microphone boost * LEDs indicating work status * Operating systems supported: Windows 2000 / XP / Vista, and MacOS 9 / MacOS X