Item Type: Auto Fish FeederMaterial: ABSSize: Bottom Length: Approx. 17cm/6.7in Top Length: Approx. 15.5cm/6.1in Height: Approx. 12 cm/4.7inUse: Fish Tank Intelligent Automatic FeederBattery Type, Quantity: 2 x AA Dry Batteries (Shipped Without Batteries)Description of Button Function.Manual: Manual Feeding Mode, Press the Manual Button Once, the Cylinder Rotates One WeekAuto: Automatic Feeding ModeCustomize: Automatic Feeding ModeSet: Time Setting ButtonAdjust: Time Setting Button1Automatic Design: Auto fish feeder automatically feeds your fish at regular intervals, or you can press the "manual" button to start feeding immediately, so you don't have to worry about your fish not being fed when you're away from home. 2LCD Display: The fish automatic feeder has a large LCD screen for easy viewing of settings and an intelligent dual mode for setting multiple feeding times. 3Large Capacity: The fish tank automatic feeder has a large storage space of 200ml, which eliminates the need for frequent refilling, and a large opening for storing a variety of different feeds. 4Two Modes: The fish tank with lid can be clamped to the wall of the tank, the fish tank with lid can be placed on top of the tank, two installation modes can be chosen at will. 5Spill Proof Design: The aquarium tank timer fish feeder has a feeding funnel so that fish food can be added directly to the fish without fear of spillage. 6Convenient to Use: The auto fish food dispenser allows for quick battery replacement without the need for frequent disassembly for recharging, and is exceptionally quiet for quality sleep.1. The interval between feeds is at least 1 minute. If the next feeding time set is the same as the previous one, it will be assumed that no feeding will take place this time. At the end of the setting you enter the custom feeding mode, where CUSTOMIZ is displayed at the top of the screen and the number displayed on the left side represents the number of feeds per day. This means that in custom mode you can feed at least once a day, up to a maximum of 6 times.2. In any mode, press the MANUAL button, the MANUAL indicator will light up at the top of the screen (other mode indicators will go out), the feeder will talk about an additional feeding, the barrel will rotate for one week, after the feeding is over, it will return to the previous mode (automatic mode or custom mode).3. Manual feeding mode: To switch to manual feeding mode in any feeding mode, press and hold the Manual button for approximately 3 seconds, Manual will be displayed at the top of the screen and the feeder will enter full manual feeding mode. The previous custom mode setting will not be cleared and you can speak into custom mode at any time afterwards to use it.4. In any state, press the CUSTOMIZE button to put the feeder into custom feeding mode. CUSTOMIZE appears at the top of the screen and in this mode you can freely set the feeding time for each feeding.5. The battery is too low capacity protection alarm and cannot continue to work, please replace the battery.6. Please allow for some errors in manual measurements.1 x Auto Fish Feeder (Battery Not Included)1 x Flush Mount 1 x Fixing Screw 1 x Feeding Spout 1 x Instruction Manual