Do ultrasonic pest repellers really work in a car? Thinking about moving the GTX from the garage to a barn for a short period of a few months but concerned about mice, etc., finding a nice warmer home. There are lots of ultrasonic battery pest repellers but do they really work or even repel? If they do work is it best to have two or several at different locations? Here's an example that is "top" rated for whatever that is worth? Going to go check out some video reviews but just thought I would see if any members have any experience or anything to say? Thanks.

Mike