Features:1. High-performance microphone, true sound reproduction.2. High sensitivity, bid farewell to the limitation of traditional 3.5-pin effective distance.3. No other devices are required to access the recording.4. Flat and wide frequency response for crispness and clarity.5. Can be used with any computer with a USB port, free of driver on windowXP system, plug and play.Specification:Sensitivity: -47dB ± 4dBSensitivity reduction: -3dB at 1.5VWorking voltage: 4.5VFrequency response: 100 ~ 16kHzSignal to noise ratio: More than -67dBLine length: 0.7-0.9Mquantity: 1The bracket is made of all-steel structure, strong and durable.