Happy Hours 4 Times Timer LCD Automatic Manual Auto Aquarium Tank Pond Fish Food Feeder Feeding Dispenser Mini shape, space-saving for your aquarium. Simple operation and installation. Note:The logo "Lo" displayed on the LCD indicates the power is low. If batteries are not replaceed after 3 days, all the programme will be stopped, and the feeder box may be stopped in the inappropriate place. Small particles (&phi;1.5) diets can be loaded 70 grams, 5 grams each time, you can feed 14 times; Large particles (&phi;4.5) diets can be fed 40 grams, 2 grams each time, you can feed 20 times.