UNIVERSAL: 2 AAA batteries included, can last 3 months. Feeds all kinds of fish food, including flakes, pellets, powders and strips. Ideal for aquariums and aquariums. Can feed the most fish, turtles, tritons and ATTENTION: please follow the instructions to configure the rotation times per revolution, otherwise the charger will not work FEEDING TIME: Up to 4 hours of feeding per day and 1-2 rotations per hour. Easy setup, just follow our manual and you will find it easy to set 4 hours power on the machine. Choose the hours yourself power supply. What’s more, the feeder has a manual button, have fun feeding the fishes by yourself. INSTALLATION METHODS: The charger has 2 installation methods to choose from. It consists of fixing the charger to the wall of the tank using the support. Another is to stick the charger with a double-sided sticker on the cover of the reservoir. Make sure feeder can be above water level to keep fish food dry. EASY CONTROL: By adjusting the slider, you can