Self-cleaning piston with integral wiper spring significantly reduces clogging and maintenance. Selectronic® proximity system with universal sensor provides hygienic, hands free operation. State of the art electronics prevent ghost flushing. Dezincification Resistant semi-red brass alloy. 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. Adjustable sanitary flush cleans the fixture and maintains the trap seal. Chemical-resistant EPDM Seals for extended life. Adjustable tailpiece for rough-in flexibility. Can be installed left or right handed. All exposed parts are chrome plated.