The operation is really easy; multilingual and understand instructions do not need. The measured temperature deviates significantly less than the specified measurement uncertainty of 1 ° C from the other 2 thermometers from, rather in the range of 0.3 ° C so completely OK.
Nice that the coin cell you need included, and that the outdoor sensor is even waterproof. It adapts quickly to the way in from the freezer and the displayed temperature drops every 5-6 seconds by around 2 ° C, creates so well in one minute to the massive difference in temperature.
The package I found reasonable - well protected without too much bags, etc.
