Automatic & Timer Feeding: This automatic fish feeder can be operated on a schedule or manually, making fish care easier. It dispenses food once or twice per day at preset times. Manual feeding option allows you to interact and enjoy feeding your fish.Battery Operated & Two Capacity Options: Offers two chamber sizeslarge capacity (210ml/100g) and small capacity (100ml/50g). Powered by 2 AA batteries (not included), it can last 2 to 4 months. Ideal for daily use at home or during travel, ensuring your fish are fed even when you're away.Two Mounting Methods: Designed with two installation options to suit different tank setups. Secure the feeder to the tank wall using the included holder, or attach it to the tank cover with the double-sided adhesive sticker.Moisture-Proof Design: The hopper features a moisture-resistant construction to keep fish food dry and prevent clumping or jamming. Compatible with various food types including flakes, pellets, powders, and strips.Easy Installation: Before use, test the food output by adjusting the control slider to ensure proper portioning. Use the included clip to mount the feeder securely on the tank edge, ensuring it is level and properly aligned.