Feture: 1) Min.100m transmission range in open area 2) More than 380 TV lines resolution 3) Camera: 1/3'' Color CMOS, 6mm Lens, 300000 Pixels, Min.Illumination 1.5 Lux, with IR LED lights 4) 4 Transmit/Receive channels for your choice to avoid possible interference, and can be switched by manual 5) Frequency: 2.414GHz,2.432GHz,2.450GHz,2.468GHz 6) With IR night vision (effective range: 5m) 7) The receiver can support 4 cameras at the same time, and with the auto-channel scan function 8) Built-in microphone for audio monitoring 9) Alloyed shell, weather-proof structure for outdoor installation