Installation: According To The Form Of The Tank, You Can Choose Two Methods To Install The Auto Fish Feeder 1Install The Fish Feeder To The Tankaquarium Wall And Tighten The Screws 2Paste 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 Itll 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 Anual Feeding: Just Press The Manual Button To Achieve Instant Feeding Ong 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 Bthe Feeder Is A Precise Product Which Can Not Be Disassembled By Non-Professional Way Cwhen 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, Well Help You At Once