The Zoo Med Repticare Terrarium Controller is a programmable 24 hour timer and power strip in one! Designed to provide a natural day/night cycle for your reptiles, this easy-to-use controller includes 8 grounded outlets. It features 4 timer-controlled power outlets and 4 continuous power outlets, enabling you to run all of your terrarium-related equipment and accessories. The Terrarium Controller is easily programmed using the analog dial, and comes equipped with a grounded 3-prong receptacle for safety and peace of mind.