Product review (1 stars): I would give it a zero. The thing never ...
I would give it a zero.  The thing never ever worked.  Indoor reading was warmer than true reading, and outdoor reading 1)had issues with connecting/receiving signals from the sensor from 4 feet away and 2)gave incorrect readings, sometimes off by 25 degrees.  DO NOT BUY THIS UNIT IF YOU ARE LOOKING FOR SOMETHING THAT ACTUALLY WORKS!