Cascada Automatic Hands Free Goose Neck Sensor Faucet by Cascada Showers Chrome Plated Cast Brass Bodies, Easy to operate; Touch free operation; Infrared sensor operated, Waterproof sensor with Advanced circuit design saves electricity and water Three-year battery life ; Sensor is not affected by reflections or abnormal lighting Self-adapting sensors range; Long life durable body Operational water pressure range: 0.05 - 0.6MPa ADA Complaint; Dual Power (AC 110 v/ DC) Battery:4*'AA' size cells