Imagine you are going out for work, shopping, travelling, etc. What should you do with your beloved fish in aquarium? We surely cannot take with them wherever we go. In the meantime, we don't have the heart to leave them lonly at home. This item can easy your life. From now on, your fish can enjoy your considerable care and love at home whever you are. Specification:Model: AK-01S,AK-02,AK-03Material: ABS PlasticSize: about 12*8*14cm[Conversion: 1cm=0.3937 inch, 1inch=2.54 cm] Features:For many different kinds of fish food.Adjust food outlet as your need.Automatic to feed fish when you are not at home.Set the timer(12/24hours or 8/12/24hours) as you need.Easy to use, simple operation and installation, manual and automatic.Moisture-resistant hopper keeps food fresh and accommodates most types of food, including flakes, pellets or crumbles.The feed slot is transparent, so you know just how much food is left inside. AK-01S: Timing control:12 hours or 24 hoursPowered by:2pcs AA batteries (Not included) AK-02 upgrade: Timing control:8 hours or 12 hours or 24hoursPowered by:USB Cable(included) / 2pcs AA batteries (Not included) AK-03 Wifi Smart:Timing control: 8 hours or 12 hours or 24 hours(on the feeder) or APP Customized. Powered by:Power Adapter/USB Cable(included) / 2pcs AA batteries (Not included) Remote control:It is necessary to connect to the wifi in the DC5V power supply state. Adjustable Feeding TimesYou can feed 1 to 3 times a day(on the feeder), max 10 times feeding(on app) depending on the option you use. Controllable Amount of FoodThe amount of food you disperse is adjustable. Simply adjust the setting to the amount you want to feed and it will automatically dispense at the regular schedule. AK-01S Package Included:1 x Fish Feeder1 x 50g Food Container1 x Fixed Clip AK-02 Package Included:1 x Fish Feeder1 x 50g Food Container1 x Fixed Clip1 x USB Cable AK-03 Package Included:1 x Fish Feeder1 x 50g Food Container1 x Fixed Clip1 x USB Cable1 x Power Adapter(According to different countries, we will send corresponding adapter.) Note:-Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully.-Please allow 1-3CM differs due to manual measurement.-Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.