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. When you're done, simply remove your hands, and the water will stop. Remember to replace the 4 'AA' batteries regularly to keep it working properly. The in - line filter helps keep the water clean, but it should be checked and cleaned occasionally. Also, make sure the sensor range is set according to your needs. Keep the faucet body clean with a soft cloth to maintain its brushed nickel finish and ensure long - lasting performance.