Installation: ?According to the form of the tank, you can choose two methods to install the auto fish feeder. 1.Install the fish feeder to the tank/aquarium wall and tighten the screws. 2.Paste it on the tank cover with the double-side sticker. How do I set up the feeding time? ?Switch on or off: press the power button for 3 seconds. 1st,hold the "SET" button until the numbers blink. 2nd,use arrows to set the hour, press SET once then set the min.(24h-Hour System ) 3rd,pres SET once and the first box on the left should begin to blink along with the time. This is your first time feeding. Set the hour and min the same way then press SET and only the box will blink. Use the arrows to show a 1,2 or3 in the box. That will be the number of times the canister will spin per timed feeding. If you set 1 it will only spin once, and so forth. 4th,Repeat the process with the last 4 boxes. Once you are done it'll return to your current time and you are ready to go. The manual button will rotate the canister once anytime you push. Tips: ?When the time setting is completed, please press the "manual" key to save the current setting and exit. ?Manual feeding: just press the "manual" button to achieve instant feeding. ?Long press the "-" button for 5 seconds to delete all settings. Notice: a. Install the fish feeder over the water level and not make it fall into the water. b.The feeder is a precise product which can not be disassembled by non-professional way. c.When the lithium battery power is exhausted, please recharge it in time ? Our products are well tested before delivery,please feel confortable to buy, If any problem, please feel free to contact us ,we'll help you at once. ? ?LARGE CAPACITY AND UNIVERSAL?- 200ml capacity of the digital fish feeder is suitable for various fish foods such as flakes, pellets, powders and strips, and suitable for different pet such as fish, turtle, newt and frog. ?TWO INTALLED METHODS?- You can choose two methods to install the auto fish feeder. One is to intall it with the pedestal, the other is paste it on the tank cover with the double-side sticker. Make sure the fish feeder is fixed over the water level and not make it fall into the water. ?EASILY ADD FOOD AT THE TOP?- Adding the fish food at the top of the fish feeder, not to take down the food bucket, so you can increase or decrease easily the amount of dispensed food. Because of the 360°rotation of the pedestal of digital fish feeder, you can rotate it to the satisfying position after it is installed. ?FOUR EXACT FEEDING TIME DESIGN?- You can set up to 4 exact feeding time every day and 1 - 3 rotation every time. According to your different demands, you can set up different exact time at vacation. ?USB RECHARGING?- Built-in large-capacity lithium battery, according to different settings of feeding, the automatic fish feeder can be used for 3 - 6 months when it is fully charged by usb cable.Best Sellers Rank: See Top 100 in Pet Supplies. : B07NV6GLXH. Manufacturer: TOPBRY. Date First Available: March 29, 2019. Batteries: 1 Lithium Ion batteries required. (included). Package Dimensions: 6.54 x 4.76 x 3.5 inches; 9.6 Ounces.