WATER-SAVING: Automatic shutting off ensures the faucet reduces overall water usage without sacrificing water pressure. SIMPLY & CONVENIENCE OPERATION: When the sensor is activated, the faucet automatically supplies water as soon as hands are within sensing range, and stops when you move away from your hands. ENERGY-SAVING: Sensor tap is powered by 4pcs AA alkaline batteries (NOT included), the battery can last about 2 years for family use. EASY-INSTALLATION: Single hole mounted with all the necessary UK standard accessories; Suitable deck thickness 20mm; Suitable hole diameter 20-30mm;      Faucet comes with water mixer valve to adjust the water temperature. DURABLE: Chrome finished Solid brass construction for reliability and long-lasting performance.