Specifications: Material: Plastic Color: Yellow/ Blue Size: 14*14*8CM/ 5.51*5.51*3.15in Power supply: 2*AA (not included) 1. The fish feeder can start fish-feeding at the scheduled time (once or twice a day) or you can start feeding fish immediately by pressing the manual button. Whether you are at home or on vacation our fish feeder is perfect for daily use. 2. Adjust the feeding amount through the adjustment switch on the feeding box and press the button to feed automatically immediately without affecting the timing setting. Dual time zone feeding 12 hours/time to the left and 24* times to the right. 3. Mounting Methods: 1. Use the fixing clip to install and fix the fish feeder on the edge of the water tank which can be used for the fish tank without the cylinder cover 2. Use the double-sided hook-and-loop fastener one side is on the power cover of the feeder the other One side is on the tank cover of the aquarium to fix the fish feeder which can be used for the fish tank with cylinder cover. 4. The fish feeder has 2 feeding boxes which are used to add 50g or 100g of fish food to different fish tanks. You can choose a suitable feeding box according to your needs. 5. The moisture-proof hopper keeps the fish food dry and does not become wet or blocked. It can hold most foods including flakes granules or crumbs. Packing List: 1x Electric Automatic Fish Feeder