This 6" Dura Mag flanged mag meter includes a field-replaceable battery with a 5 year battery life, 3 year battery warranty, and an internal data logger to track water usage more accurately. 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 Gallons per Minute (GPM). Not available for shipping into Idaho.