the 12 or 24 timer button, the product rotate once, and the indicator light also go out. This is a normal state. Then the timer is start, and it automatically feed at the time interval you set. (Don't any buttons halfway, especially manual buttons. After pressing manual, the timer be cancelled.) [Manual and Automatic Mode]: the manual button to feed immediately. the time button to set the feeding interval to be 12/24 hours, and the feeder automatically feed the fish at the time you set. [Adjustable feeding amount]: The size of the food outlet on the material bucket can be adjusted according to your needs. [Food moisture prevention]: Closed material barrels can keep fish food dry to a certain extent without blocking the outlet. This feeder is suitable for fish food in the form of strips, powders, granules, and flakes. [Easy to install]: Two installation methods. You can attach the feeder to the wall of the aquarium using a mounting bracket, or use double-sided adhesive to attach it to the lid of the aquarium. Color: As shown Material: plastic Package Contents: 1*feeder 1*fixing bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.