Overview:4 channels video input in one card, the maximum display/recording rate is 25fps under PAL format, & 30fps under NTSC format.4 screen display modes are available. Multi alarm triggering method: sensor, motion, video loss, & HDD space shortage. Support schedule recording mode, recycling recording method available.MPEG4 video compression format. 5 level recording quality options available, & the recording frame rate range from 1 to 30fps adjustable for each channel. Support multi-channel playback, searching by time/date & recording events, images can be Zoom/capture/save/print/backup. Support remote surveillance & PTZ control through web browser, support dynamic domain name. Configurable auto reboot function for preventing PC deadlock. System requirements: Windows 2000/XP/ Vista, Intel P4 CPU, 1700MHZ HDD:80G, RAM 256M memory Microsoft Direct X 9.0C USB (Universal Serial Bus) 2.0 port & Audio Card Specification: Weight Approx:130g Size Approx:100 x 6.1 x 2.1