The FixedFlo automatic faucet system features non-adjustable water flow technology. The unit comes in 0.4 gpm, 0.5 gpm, and 1.0 gpm water flow models. No diaphragms are used, which eliminates maintenance. The faucet works with or without an aerator and features low lead content. It is designed to work in hard water environments using a reliable motor drive with a 5-year warranty. Multiple power sources with back-up power and various spout models are available.