Overview:4 channels video input in one card, the maximum display/recording rate is 25 fps under PAL format, & 30 fps under NTSC format 1 channel audio input 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 1to 30 fps 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 Alarm notification by e-mail with image Send e-mails attachments with image Save image on hard drive Dynamic mask on motion-detection area of multi-camera (one ~ four) Sound alarm Video signal filter, for filtrate active & invalid channel Signal lost alarm Motion detection Adjustable sensitivity Automatically lock, while not any operate Schedule Monitoring sessions, for timer snap Record video/audio (with usb 2.0 audio interface) snap shot Automatic space management. Stop recorder or capture still automatically on disk full Support 4 channel video input on one computer Support on screen display. Displays date & time, or channel description on video Supports manual open/close Invalid channel, or add/delete channel description Supports login & logout, by user name & password Support For All Formats: Record in DVD /-R/RW, DVD /-VR, & DVD-Video Specification: Weight Approx:75.8g Size Approx:26 x 2.5 x 1