Attention: 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 , 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: 2x fish tank feeder 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.