Automatic Fish feeder:This timed fish feeder can feed fish automatically by simply setting. Never need worry the feeding problems when vacation or on business. You can set up the fish food amount, feed times, when to feed the fish, manual or automatic. Up to 2 times Per Day: Program the feeding interval to once or twice per day by adjusting the hour switch to the 24H or 12 H position.Adjust the slider to setup the food amount1-6 different amount level for your choose). 1 rotation per time. Also,youcan switch to the manual mode if you want. Follow the manual to set modes easily. Flexible and convenient. Food style choose:This item can be only used for the dry food. Very Suitable for pellets, granular, strip and flake fish feeder. Please put this item above the tank higher to avoid the food getting damp. Then fix the tank lid well and only leave a hole.Put some aquatic weed to the hole and let the food drops to this hole, the fish will come to eat the food. Easy to install: Two ways to install the feeder to the tank. 1.Clip on the tank wall by rotating the screw. 2.Affix the feeder with double-side sticker (included) on the fish tank cover. Choose proper way per your needs. Battery operated&Easy Clean: Powered by 2 AA batteries(not included).When you clean the food tank,Just remove it, thoroughly rinse with warm water and clean the drum. Make sure drum is completely dry before adding food. Specifications: Model:AF-2003D Food tank:60ml Housing: Plastic Type of battery: 2*AA 1.5V batteries batteries Attachment Method: retaining clips or Velcro fixed Unit dimensions (approx.):3.8*2.9*2.9 inch (9.7*7.5*7.5cm) Feed box diameter: 6x2.7cm(Lx H) Feedings: Small particles (1.5) diets can be loaded 40 grams, 8 grams each time, you can feed 5 times; Large particles (4.5) diets can be fed 28 grams, 1 grams each time, you can feed 28 times. Notice: When you turn adjustor to the middle level,it will only compatible for small particles.5grams each time,you can feed 8times Install methods According to the form of the tank, there are two installation methods feeder. 1. Edge of the stent placed in the tank, tighten the plastic screws. 2. Velcro on both sides will be separated, torn sticker on the back, were to be attached to the bottom and the tank cover feeder appropriate location. Notice: 2 x AA 1.5V Battery not included. Don't twist the feeding box by hand. Do not use rechargeable batteries. Package included: 1 x Automatic Aquarium Fish Food Feeder 1 x User manual