USB 2.0 DVR SURVEILLANCE SYSTEM (4 CHANNELS) is the safety system of ideal design for home/office/shop guard or baby care purpose; users can do their own security by easy installation. It is the cost-effective solution to replace commercial VCR tape recorder, which also supports stable digitize video record and easy manages the recorded data via index of date and time. That?s it, makes your life more safety and easier. Many more surveillance products at our website at KWS.