LUSMO Automatic Pet Feeder Orange L-AF120O For medium-small dog or cat. For indoor use only. Cannot use in wet location like a bathroom. Use only dry pet food. Do not use food longer than 0.6 inches (15mm) as it may get caught in the feeder and stop operation. Do not use canned food, moist or semi-moist food and treats. Batteries are not included. Only use alkaline batteries. Will not work with any other type of battery. The feed amount differs depending on the size and shape of the food. So, after setting the amount, measure the food actually fed automatically to confirm the amount.