The faucet is powered by batteries powerful enough to provide you with over 100,000 washes ensuring that you don't need to worry about replacements any time soon. Because this faucet operates on motion sensors, there is no need to touch the faucet whilst washing, thereby eliminating the possibility of germs and bacteria transfers, thus keeping you, your family, and your visitors safe from illnesses and diseases. Perfect for large homes and establishments, the Elena Touchless Sensor Faucet is definitely one purchase well-worth considering. Ideal for commercial use applications in public restrooms, restaurants, office building, public facilities. Fits all standard US plumbing.