Features a digital LCD display with adjustable settings. Includes a photo sensor with user controlled day, night, and both mode buttons to select the time period of operation. A built in rechargeable Ni-MH backup battery stores settings in case of power outage. With AC power supply, the indicator lights up and functions normally. Without AC power supply, the indicator goes out and the system enters standby mode. Working Current: 16A Max. Brightness Setting Range: 0-99. Built-in Battery: 3.6V. Working Temperature: -10°C to 40°C. Voltage: AC110V. Plug Type: US Plug. Color: As shown. Material: Plastic. Suitable for hydroponics, aeroponics, pumps, exhaust fans, CO2 generators, tanks, and ozone generators. Package Contents: 1 x US-spec light-controlled timer.