USB 2.0 water-proof Wireless Web Ready DVR Security System w/ 2 Pack Highigh Resolution Indoor/Outdoor Night Vision Surveillance Cameras USB 2.0 output to PC and AV output to TV/Monitor;Bundle with security software;Image capture, and high speed MPEG4 real-time recording;Night vision (Effective range: 7m);Alloyed shell, Weather-proof structure for outdoor installation;Built-in microphone for audio monitoring;4 channels optional to avoid possible interference;Up to 100m (330ft.) transmission USBrange in open space CAUTION:1.The product is only suitable for PC with USB 2.0 port.It doesn't support USB 1.1.2.It only support Windows XP/2000/NT.3.Include the digital video recording tool:WinDVR General:Operating Temperature 	-10 ~ +50(Degree C) / +14~ +122(Degree F);Operating Humidity &lt;=85%RH Camera:Imaging Sensor Type:CMOS;Picture Total Pixels:PAL:720576 Pixels;NTSC: 720480 Pixels;Minimum Illumination :0Lux;Transmission Frequency :ISM 2,400~2,483 MHz;Operating Frequency 2414MHz;2432MHz;2450MHz;2468MHz;Modulation Mode :FM;BandWidth :	18M;Night Vision Range :7m;Dimensions(WDH):45*78*83 mml;Weight :217g; Receiver:Receiving Frequency :ISM 2,400~2,483 MHz;Dcmodulation Type:FM;Antenna:50 ohm SMA;Dimensions(WDH) :68*78*16 mm;Weight :119 g Attention: The operating frequency of our product is 2414MHz, 2432MHz, 2450MHz and 2468MHz. You could adjust the channel switch to set the channel of camera for multi-camera working or avoiding the interference. Please make sure you are NOT using other wireless equipment in the frequency you select. It will be badly interfered with each other that in the same frequency. Autual transmission range may vary according to weather, location, interference and building construction.*16 mm;Weight :119 g