Features: It has a capacity of 500ml and can feed fish with a maximum of 4 meals per day, with a maximum of 50 servings per meal, about 2 grams per serving. The time and size of each meal can be set independently.  Excellent sealing, eliminate insect and ant infestation. A built-in drying box, can place the desiccant, keep the fish food fresh for a long time.  Battery and power supply, two power supply mode choice, even if the power failure also does not have to worry about fish food.  Set parameters once and save for a long time. Even if the power is completely cut off, all parameters will be saved automatically. It shows the electric quantity, automatic alarm for low battery.  Suitable for fish food up to 4mm, 3 mounting options, fit for most fish tanks.   Specifications: Item name: Automatic fish feeder;  Material: ABS;  Color: White;  Capacity: 500ml;  Battery: 4*AAA battery(not included);  Product weight: 390g;  Product size: 90*90*180mm;  Package weight: 550g;  Package size: 23*12.5*11cm;   Package list: 1*Automatic fish feeder;  1*USB cable;  1*Base;  1*Holder;  1*Double-sided tape;  1*Desiccant;  1*English manual