Wireless, cameras can be battery operated, very clear image, inbuilt microphone

Poor wireless range, sound is barely audible, night viewing range is limited

A cheap video security system with excellent image quality, although it is limited by its wireless range.

Ok prices, wireless, colored cameras, easy to settup

Does not works! Probably from interference of network wireless. I tried disconnected the wireless, but the pictures still not good. Possible from interference from my neighbours' wireless