Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Display difficult to read, wouldn't sync up

Bought this thermometer for my Dad as a Christmas gift. The display is difficult to read unless you hold it at an angle (there is no contrast adjustment for the LCD). Upon initial power up, it took a VERY long time and several attempts for the display unit to "sync up" with the thermometer unit. We finally got it working, but I was very disappointed in how much effort it took. Aside from these shortcomings, this thermometer works "as advertised".