... System: 1.Built-in 2.4G wireless receiver 2.Distance:100m (barrier-free) 3.Reception capability:-80 2.4GHz Wireless Camera System Features: 7 ... color LCD rear view monitor with digital sreen Built-in 2.4GHz wireless receiver. Frequency range:2400~2483MHZ,Group supported: 2414,2432,2468 ... available: AUTO /PAL/ NTSC.1DVD input and 4 channel receiver, 1 channel for video output and 1 channel for audio ...