Using your Bobrick B - 8878 automatic faucet is a breeze. Just place your hands under the faucet, and the hidden sensor will detect them, starting the water flow. To adjust the time - out duration, you can use the settings on the faucet. Remember to replace the 4 'AA' batteries regularly to keep the unit running smoothly. The in - line filter helps keep the water clean, but it may need to be replaced from time to time. For maintenance, wipe the faucet with a soft cloth regularly to keep its polished chrome finish looking great. Avoid using abrasive cleaners as they can damage the surface.