Using this Bobrick faucet is easy. Just place your hands under the faucet, and the hidden sensor will detect them and start the water flow. It runs on 4 'AA' batteries, so make sure to replace them when the faucet's performance starts to decline. The in - line filter helps keep the water clean, but it should be checked regularly and replaced if it gets clogged. You can adjust the time - out duration according to your needs, and also set the sensor range. When it comes to maintenance, keep the faucet clean with a mild cleaner. Avoid using abrasive materials that could scratch the polished nickel finish.