[Jonesy]

I have 4 of these. I use them in trailers and cars that I own. They are very accurate as far as the location. They do send you texts when you leave the area they are in. I think thats just a setting you can change to not get the alerts, but I leave mine because I want the alerts. One thing that does happen if someone has iPhone and use your trailer, it lets them now that a tracking device is nearby, which could also let a criminal know they are being tracked. But then they would have to find it and you can make that as difficult as you want.
I put them under the carpet, under seats in cars. You would be able to go right to the spot the air tag is at and you can even track it as its moving.

I have had mine over a year and in 20 below weather etc and they all still work fine.