Moen dual-flush valves rely on the timing of the individual in the stall to determine the strength of the flush in commercial water-closet applications. The sensor-operated valves allow the user to be in range for up to 60 seconds for a reduced 1.0-gal. flush. After 60 seconds, a full 1.6-gal. flush is activated. These flush valves are available in a variety of power options, including standard AA batteries or low-powered AC adapters. Retrofit kits also are available for existing electronic or manual-flush valves.