Perfect for the holidays and for people who travel reatails for $55,this feeder can be set to feed twice a day or fed a desired amount manualy. It is very convient for fish keepers who are not at home often battery life for two double a batteries is about one year or more. View my other ads by clicking veiw store front to the left for more aquariums, terrariums, and accesories. Call for a faster response.