This Mini wall clock hidden camera compatible with AVI format, support video record with sound, memory onboard to keep recorded video files. Resolution is up to 640x480 pixels. There is li-ion battery built in the camera, It is very easy to operated and no installation is required can work one and a half hours continuously (Max). The camera and transmitter are hard to be found by human eyes, 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! Specification:1.  wall clock camera2. Build-in 4GB Memory3. Table clock, be erect on table4. Video format: AVI 640x480 @ 30fps5. Build-in microphone6. USB2.0 interface7. Video record with sound8. Built-in Li-Battery: working one and a half hours continuously (Max)9. Windows ME/ 2000/ XP/ Mac OS 9.2.2 or higher, no need driver

4GB Wall Clock DVR