Using this faucet is easy. Just wave your hand near the sensors for touch - free activation. The indicator lights on the spout will show you if it's powered, activated, or if the battery is low. As for the battery, a pack of 4xAA alkaline batteries is included as the power source. When it's time to change the batteries, simply open the battery compartment and replace them. Keep in mind that this is a non - returnable item. For maintenance, clean the faucet regularly with a mild cleaner. Avoid using abrasive materials that could scratch the Brushed Black Stainless PVD finish. Since it's certified lead - free, you can use it with peace of mind for your daily water needs.