Main features: 4 Channel video 2 Channel audio Connect to any Desktop or Laptop through USB Port Record live video from the camera connected to the Hard drive in PC 4 channels video input,the maximum display/recording rate is 25 fps under PAL system and 30 fps under NTSC system Display/Recording: 30 frames per second Multi-alarm triggering method: sensor alarm,motion detection,video loss,and HDD sources shortage Supports schedule recording mode Video compression format: MPEG4 5 level recording quality options available Recording frame rate range from 1 to 30 fps adjustable for each channel Recycling recording method available Support multi-channel playback Search by time/date and recording event Support remote surveillance and PTZ control through web browser Support dynamic domain name Auto Mail notification sends you a picture of the movement captured by camera Mobile phone remote surveillance Specification: Input Type RCA Video Input 4Cams Audio Input 2 Ch Audio on board.1 Ch PC Audio VGA format PAL/NTSC Video Output 1Ch VGA Video Output via PC Display Rate 25 fps(PAL),30(NTSC) Recording Rate 25 fps(PAL),30(NTSC) Compression Format MPEG-4 Video Resolution 704x576,352x288(PAL),640x480,320x240(NTSC) Recorder Media HDD,USB Disk,ZIP,CD-R/W via PC Record Mode Motion/Sensor/Schedule/Manual Network TCP/IP I/O Device 4Ch Input,4Ch Output,1Ch Relay Output(external I/O board) Communication Port USB2.0 Remote Software Support Internet Explore System requirement: OS Supported Windows 2000/Windows XP CPU Intel Pentium III 800(minimum) RAM 256M(minimum) HDD 80GB(recommended) VGA 32M Package Including: One 4CH USB 2.0 DVR Card One user manual