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4 Camera Wireless USB DVR Security Camera Kit 2010 Receiver Model with BUILT-IN USB DVR and NEWEST CAMERAS! Infrared ( Night Vision ) - Audio - Indoor / Outdoor / Motion Detection Includes everything you need to set up a PC based security surveillance system in your home or store!Key Specifications/Special Features:As a USB DVR Network DVR Four channel quad picture Motion detection mode 100m transmission distance Schedule record mode Motion detection mode Sensor alarm record mode Recycling record mode Camera works with wire and wireless PTZ control function Users management Multi-channel display Supports 320 x 240/640 x 480 pixels (NTSC), 352 x 288/704 x 576 pixels (PAL) standard resolutions Image color adjustable for each channel, including contrast, lightness, hue, and saturation MPEG-4 compression format, greatly reduce HDD usage Powerful video playing back functions, including playing back, pause, stop, fast-forward, single-frame play and image capture Supports advanced search mode. Users can search by date/time, camera, record mode, and random combination of the three methods Supports recorded files backup, delete by date/time, camera Convenient to extend system functions by software upgrade CPU and storage resources saving by advanced technology Remote surveillance and PTZ control through LAN, Intranet, and Internet Supports alarm pre-record Supports buzzer, email alarm out Can greatly decrease fragmented files while using NTFS partition User-friendly graphical user interface Transmission frequency: ISM 2,400MHz to 2,483MHz 4CH Modulation mode: FM USB: 2.0 Operating temperature: 0 to 50 degree Celsius Storage temperature: -20 to 60 degree Celsius Operating humidity: 85%RH Camera: TV system: PAL NTSC Validity pixel 628 x 582/510 x 492 pixels Image device: 1/3-inch OmnVision CMOS Horizontal definition: 380TVL Angular field of view 45° (f=6mm) Minimum illumination: 0 lux Scanning frequency(H): 15.625KHz, 15.734KHz Scanning frequency(V): 50Hz, 60Hz Power adapter: 12V DC/500mA Dimension: 57 x 68mm Weight: 180gReceiver: Receiving sensitivity: -85dBm Video output: 75Ω/1Vp­-p Audio output: 10KΩ/500mVp­-p