Add the Battery Backup to your Valve Controller to protect your home from water damage for up to 12 hours (and one valve cycle) during power outages. Simply slide the battery unit into the rear of the Valve Controller to power your Valve Controller. The Battery Back up automatically recharges when inserted into the Valve Controller while the Controller is plugged in. 

•  Battery Backup Dimensions: 22.52” x 1.44” x 1.25” (L x W x H)
•  For use with Guardian Valve Controller (sold separately)