Features: 1) Min.100m transmission range in open area 2) More than 380 TV lines resolution 3) Camera: 1/3'' Color CMOS, Pinhole Lens, 300000 Pixels, 2 Lux Min.Illumination 4) 4 Transmit/Receive channels for your choice to avoid possible interference 5) 4 channel frequency: 2.414GHz,2.432GHz,2.450GHz,2.468GHz 6) Built-in microphone for audio monitoring 7) Video won't interfer with Audio 8) Package Contents: 1 transmitter box, 1 receiver box, 2 pieces of A / V cables, 2 AC/DC adapters