American Standard 6066121.002 Selectronic 1.28 Gallons Per Flush Electronic Flushometer -

SELECTRONIC DF TOILET FV, LLB, 1.28/1.1
Self-Cleaning Piston with integral wiper spring significantly reduces clogging and maintenance
Dezincification Resistant semi-red brass alloy
Selectronic Proximity System with universal sensor provides hygienic, "hands free" operation
State-of-the-Art Electronics prevent ghost flushing
Fully Mechanical Manual Override Button can flush the valve without power
Fail-Safe: Valve automatically closes upon loss of power or water pressure and does not need to be reset
Safety Circuitry prevents overheating of the battery in case of short circuit, protecting the electronics
Adjustable Sanitary Flush cleans the fixture & maintains the trap seal.
Chemical Resistant EPDM Seals for extended life