TempaComp

I like the design. I work around magnets and they always misaligned my button compasses, but this one stays true. I've just purchased my 3rd one because the thermometer fell out of the previous 2. I suggest using tape or some other method to secure the thermometer before attaching it to any backpack, vest or PFD, because itWILL fall out at some point.

Large air bubble in compass. The compass does not spin freely. Highly inaccurate.

A mixed bag

I was shocked and disappointed by the thermometer portion of this. I expect liquid thermometers to be accurate, because any given substance expands and contracts at a certain rate with temperature changes. However, this one consistently reads about 4 degrees too high. However, the compass portion of this works well; that's the only reason I'm giving it as high as 3 stars. Otherwise it would deserve 0.