This is a 4-channel wired video surveillance device for Personal Computer (PC). It can capture images at 30 frames per second and transmit images via USB to PC video browser， displaying excellent operating interface and wonderful visual shock. PL0756 has super audio/video management function (including timing snapshots and audio/video recording), safe manually-control channels, high-quality audio/video effect and various alarm functions. Snapshot images in format JPG, recorded files in format AVI, both of which can be played via Windows Media Player and Real Player. Alarm runs as of motion detection and video loss, output by sound or e-mail.