Using this faucet is a breeze. Just wave your hand in front of the sensors, and the water will flow. It's touch - free, so it's very hygienic. You can choose between the standard battery power or use the optional AC plug - in adapter with battery backup. If you use the battery, keep an eye on the low - battery LED indicator on the sensor package. When it lights up, it's time to replace the 4xAA alkaline batteries. For maintenance, clean the faucet regularly with a soft cloth and mild cleaner. Avoid using abrasive materials as they can damage the Brushed Black Stainless PVD finish. Since it has a vandal - resistant construction, it can withstand a bit of rough handling, but still, treat it gently. Also, because it complies with ADA guidelines and is lead - free, you can use it with peace of mind in various settings.