This Mini table clock includes 5.0 MP hidden camera. Compatible with AVI format, support video record with sound ,Memory onboard to keep recorded video files. Resolution is up to 1280x960 pixels. There is li-ion battery built in the camera ,It is very easy to operated and no installation is required can work three hours continuously (Max). the camera and transmitter are hard to be found by human eyes,So small and compact that not easy to find. You can put it anywhere you want to monitor. This covert system can be applied to almost any situation!