Made of Premium Zinc Alloy and Brass: The faucet is durable and not easy to rust. Heavy solid material and finishing give itself awesome and rich classic modern style look with exquisite workmanship. Simply & Convenient Operation: When sensor be activated, the faucet automatically supplies water as soon as hands are within sensing range, and stops when you move away your hands. Water Saving: Automatic shutting off ensures the faucet reduces overall water usage without sacrificing water pressure. Energy Saving: Sensor tap is powered by 4pcs AA alkaline batteries (not included), battery can last about 2 years for family use. Touch Free: Prevent cross-infection after washing hands. No need to touch the handle to turn off after washing your hands. Convenient and clean. Water flow will stop when hands leave the sensor range, no worries to turn off the tap when soaping your hand, avoiding leaving foam on the handle.