Malibu 600 Watt Power Pack with Sensor Photo Cell and Weather Shield for Low Voltage Landscape Lighting Spotlight Outdoor Transformer 120V Input 12V Output 8100-0600-01 RISK FREE GUARANTEED! Transformer Construction: The 600 watt transformer is made of durable metal with a length of 10.5 inches, a width of 4.8 inches and a height of 11 inches (Very large). It can be placed outdoors for direct use and be protected against all severe weather conditions. The total power of the lamp is best not to exceed 75% of the power packs capacity For low-voltage landscape lights: the 120V family voltage is converted to 12V safety voltage Light Control Timing: Malibu transformers connect light sensors that sense light, transformers start automatically at dusk; set the time so that your landscape lights automatically turn on at dusk and automatically shuts off at dawn Quick and easy to install: directly mount outdoors and can be placed on the wall or mailbox side Combine with Malibu Garden Lights: Malibu Transformer with Malibu Garden Lights to make your homes lawn and garden beautiful and comfortable