Warm reminder: This product does not come with batteries and needs to be set up by yourself. PROGRAMMABLE: The timer allows you to schedule up to four automatic feedings per day. You can program it to feed at any time of the day or night and set single, double, or triple feedings. At the same time, you can also feed manually and enjoy the fun of feeding the fish yourself. Moisture-proof design: The moisture-proof hopper keeps the food dry and will not get wet or stuck. It works well with most types of food, including flakes, pellets, or chunks. Two different mounting methods: The feeder has two mounting methods to choose from. One of them is to use a bracket to fix the feeder to the wall of the water tank. Another method is to stick the feeder on the tank cap with the provided double-sided sticker. Large Capacity: With a capacity of 200ml, its large size can hold enough food to keep your fish well-fed while you are on the go. The hatch-style feeding door is fully adjustable, allowing you to decide how much food to dispense at each meal. EASY FOOD ADDITION: Add fish food to the top of the feeder without having to remove the food bucket, allowing you to easily increase or decrease the amount of food dispensed. Since the base of the digital feeder can rotate 360, you can rotate it to the desired position after installation.