Product review (5 stars): I put the outside temp gauge outside the window. ...
I put the outside temp gauge outside the window.  Turned on the inside unit on my kitchen table and wa-la... it worked and has been working PERFECTLY since!  Helps me know what the temp is outside to dress accordingly and to properly set my inside thermostat to save energy.
Really is g r e a ! ...wonder what I ever did with out it!
Ken