Security DVRs (digital video recorders) are used to manage and record the audio and video streams from one or more security cameras. But if you don't have a security DVR, a computer can make a reliable stand-in. With a multichannel USB DVR device, you can connect multiple cameras to your computer. And just like a standard security DVR, you can use the multichannel USB DVR to monitor or record the audio and video streams from the camera to your computer's hard drive.
Plug the USB end of your USB DVR into a USB port on your computer and then install the device using its included software.
Connect each of your camera to the USB DVR using a male-to-male composite video cable. Plug one end of the cable into the camera's yellow video output and then connect the opposite end of the cable to a yellow composite video port on the USB DVR -- follow the same procedure for the other camera.
Connect any audio feeds from you cameras using a male-to-male stereo RCA audio cable. Match the red and white ends, on one side of the cable, to the red and white stereo RCA outputs on the camera. Match the red and white RCA ends, on the opposite side of the cable, to the red and white RCA inputs on the USB DVR.
Power on your cameras.