Battery backup with M8 connector. For use with Medi-flo, Ozo-flo and our Aquarius range of faucets. For Medi-flo and Ozo-flo battery backup will maintain on/off function during power outages. Battery backup will only run the solenoid valve, it will not run the ozone generator. For Aquarius range this battery pack can run the faucet completely or act as a battery backup in event of power failure.