The PAL Compuvideo CV-4000 P(RM) Master Sync A/V Generator is a professional A/V generator that offers user-friendly, direct function, smart front panel control with last settings memory and auto power back-up, assuring that even if power is lost to the unit, the work continues without any interruption. This unit can be used in rack mount, desktop, and/or handheld configurations. Powered by AC/DC power and/or internal 9V batteries, this generator has 10 hours of average operation and low battery indication.