Water Efficient: Efficient water faucets reduce overall water usage without sacrificing water pressure. The sensor is powered by 4 AA batteries which should last about 7000 times or 3 years in daily household use. Automatic operation: automatic induction touch-free faucet, adjustable induction range, making your life more convenient and healthy. It senses within a fixed range and stops when you remove your hand. RELIABLE QUALITY DURABLE: Made of chrome-plated solid brass for reliability and long-lasting performance. Multiple layers of finishing and thick materials make it a great piece with a classic modern look and craftsmanship. Suitable Installation Size: In order to order a faucet that matches your sink, please check the parameters carefully. For decks less than 1.18" (30mm) thick. Hole sizes fit from 0.98" (25mm) to 1.41" (36mm). Quantity: 1 piece Size: As the pictures show