Nilotron Air Freshener Designer Series Dispenser keeps rooms smelling fresh. Choose from three spray intervals; 7.5 minutes, 15 minutes or 30 minutes and two operation mode selections; 24 hours or daytime mode Ideal for pet shops, kennels, vet clinics, homes and grooming shops Nilotron Refills offer a variety of fragrance choices Choose from 7.5-15-30 minute settings and 24-hour or daytime operation