This 8" Dura Mag flanged mag meter is equipped with DC Power (10-32v) / 4-20mA Output and includes a backup field-replaceable battery with a 5 year battery life and an internal data logger to track water usage more accurately. It comes with 6ft. of cable (open Leads - hardwired only). The meter arrives pre-calibrated with the internal data logger set to track water usage every 12 hours in Acre Inches (AIN) total units of measurement, with a rate unit of Cubic Feet p/ Second (CFS) and includes grounding ring assembly (2 grounding rings per assembly).