Delta 591TP1221TR Commercial Chrome 4" Battery/Electronic Sensor Faucet. Delta's Line of Commercial Products are an industry leader in the Bathroom Faucets, Shower Fixtures and Bathroom Accessories. The large line of Commercial Grade Electronic and Battery Powered Faucets are designed to withstand the every day wear and tear, and last for years to come. These products are ideal for hospitals, schools, and other high traffic and high use applications. This Delta 591TP1221TR Commercial Chrome 4" Battery/Electronic Sensor Faucet features a battery powered operation (4 AA Batteries) that powers the infrared electronic handwash system. The water proof infrared sensor features an adjustable sensing range and timeout that allows contractors to get the perfect setting, and conserve water. Also included with this faucet is a Hi-Rise spout, necessary mounting hardware, 12" S/S Cover, Driver Board, Solenoid for ELAVT0001RI, and a stunning Chrome finish designed to resist the scratching and tarnishing. This Electronic Faucet is ADA compliant and meets Handicapped Accessibility Standard. Hardwire Converter with Battery Back-up included.