Coralife ESU Aqualight Digital Power Center Up to seven time cycles per day, seven days per week Grounded 3 prong plug with 3 foot power cord Sliding outlet safety covers protect outlets not in use UL listed The Digital Power Center featres a digital LCD display Grounded three prong plug with three foot power cord and is UL listed Sliding outlet safety covers protect outlets not in use Up to seven time cycles per day, seven days per week Grounded 3 prong plug with 3 foot power cord