Product review (3 stars): I like that this thermometer also has a clock and alarm feature. ***UPDATE 7/19/2016***
<div id="video-block-R12QU5G8E4GLC" class="a-section a-spacing-small a-spacing-top-mini video-block"></div><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/B1gEnRm%2B-3S.mp4" class="video-url"><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/31fLh9LiuFS.png" class="video-slate-img-url">&nbsp;I bought this for my camper so I could keep an eye on the inside/outside temps and the humidity inside the camper.  I like that this thermometer also has a clock and alarm feature.  The thermometer comes simply package, easy to open, and with two sets of instructions, one in Chinese and one in English.  However, the English version might as well be in Chinese since it is very poorly done and hard to follow; I had an easier time figuring out how to program this on my own rather then following the instructions.  The battery compartment is in the back and is a little bit difficult to open and once open the battery door did not want to close back up tightly.  My thermometer came auto programed in celsius; to change this there is a reset button next to the battery door I just took a pin and pressed it to reset to fahrenheit.  Prior to installing in my camper, I set this up at home to check for accuracy and it seems to be pretty accurate inside however the outside temperature appears to be about 10 off (I checked the outside temp to AccuWeather and my car thermometer).

Given the inaccuracy, the poor instructions, and battery door, I would not go out of my way to purchase this again.
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***UPDATE 7/19/2016***  I will say the customer service provided by the seller is very good, they care about resolution and happy customers.  Shortly after my review, they sent me an e-mail to assist in resolution and provided better instructions for programing.
  -How to set time-
Under original state, press the [MODE] for 2 seconds, the Minutes number begin to twinkle, then press the [ADJ] to adjust the Minutes number. When the Minutes set up, press the [MODE], the Hour number begin twinkle, then press [ADJ] to set Hour.
When the Hour is ok, press [MODE], then you can set 12/24 hour (HR), also press [ADJ] to adjust.
Then use [MODE] to set Month(M) and Day(D).
  -The way to set Alarm-
Under current clock, press [MODE], the Bell logo appears, then press [ADJ], the .))) appears, when both logo in the screen, the number begins to twinkle, you can adjust the Alarm time. The humidity meter will automatically get back current clock in 1 minute if no any operation.

RESET button and C/F RESET is under table standing.