Coralife 05150 Power Center Day Night Timer Strip 24 hour mechanical timer with 15 minute interval settings Timer automatically switches between daytime and nighttime outlets Grounded 3 prong plug with 3 foot power cord Sliding outlet safety covers protect outlets not in use UL listed The Coralife Power Center Day Night Timer allows for control and programming of the day/night cycle for your aquarium The Power Center features a total of 8 outlets 24 hour mechanical timer with 15 minute interval settings Timer automatically switches between daytime and nighttime outlets Grounded 3 prong plug with 3 foot power cord