Using this faucet is easy. Just wave your hand in front of the dual sensors for touch - free activation. The indicator lights on the spout will show if it's powered, activated, or if the battery is low. As for the power source, it comes with a battery pack of 4xAA alkaline batteries. When it comes to maintenance, the PVD finish on the faucet is very durable and resistant to corrosion, discoloration, and tarnishing, so a simple wipe with a soft cloth is usually enough to keep it clean. Please note that this item is non - returnable, so make sure it's the right fit for you before purchasing. Also, ensure the water supply is compatible with the tempered line adapter.