Malibu 3100-1120-01 120 Watt Low Voltage Transformer, Photo Eye Sensor and Timer Converts 120 volt household electricity to a safe 12 volts Built-in photo eye sensor for auto turn on and off Fully programmable timer with Auto (dusk to dawn, 4 Hr, 6 Hr, 8 Hr, and 10 Hr schedules) Circuit Breaker Protection 120 Watt low voltage power pack