2.4GHz Nightvision USB Wireless DVR Security Surveillance System with 2 High Resolution Indoor/Outdoor Night Vision Surveillance CCTV 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 range in open space CAUTION: 1.The product is only suitable for PC with USB 2.0 port.