Detailed Instructions: In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.
Q: This air cooler works great. It has a strong air output and it's easy to carry. I like that it has a removable tray so that it can be drained with ease without having to wait for it to run out of water. It works while connected via USB even if the battery is fully discharged. The air ionizer function appears to work as a small buzzing noise can be heard when the feature is turned on.
A:
positive