Instruct: Classify the given review into positive or negative sentiment.
Query: Wothless, Worthless, Worthless

Deployed in motorhome during winter months. No food of any type stored in motorhome. Set unit on tile floor to maximize obnoxious sound emitted by this unit. Opened all cabinets to eliminate anything hindering sound wave propogation. Field mice started eating a bar of soap two feet away from this unit. This product is a joke and is not recommended to anyone (except one wishing to throw money away!)