Product Introduction: This is an USB microphone cable with its own sound card and can be compatible with a computer without additional drivers. Simply plug in your instruments or microphones and you can start recording high quality digital music easily Product Feature: Quality digital sound Embedded A/D convert with audio signal boost Red indicator light when signal is being transmitted Simple plug and play connection without additional driver Product Specification: Supported OS: Windows Vista/7, Mac OS Interface: USB 2.0 Resolution: 16bit 48/44.1 KHz S/N Ratio: 83dB Dynamic Range: 80dB Input Impedance: 1Mohm Frequency Response at 48KHz: 20-19 KHz Signal Input Range: 0-2.8Vpp Signal Boost Gain: +20dB Cable Length: 3 meters