The WS-SA-4P is a great low cost alternative to those that want an economical 4 channel/camera power supply. This 12VDC unit is rated at 4 amps so there is plenty of juice for your infrared cameras. This solution is so much better than using multiple "bricks" (plug in type single channel power transformers). Keeps the area behind your DVR that much neater. This unit also weighs less than the wall mount power supplies so it is even cheaper to ship. Has (4) sets of terminals under a sliding protective cover. A win-win for everyone!!