For this price, very good, with small drawbacks

Have decided to use this four-pack, because I want to control the humidity in all living rooms. The units have an attractive appearance and, above all, the numbers are large enough so that you can still recognize from 2 meters without glasses. That was very important to me! Another criterion was that the devices with only one AAA battery (not supplied) to operate, without button cell. You can set it up using plastic foot, or alternatively hang on the wall. The folding of the foot is somewhat hakelig, I hope that does not eventually break times.

The features include: temperature measurement, humidity measurement, time, date and alarm.

The temperature can be displayed in degrees Celsius or Fahrenheit. For me, the temperature varies in threes to +/- 0.5 ° C, a tearing out with + 1.5 ° C. The thermometer respond quite quickly to temperature changes.

When humidity measurement again three devices indicate almost identical values ​​with +/- 2% deviation. The 'temperature outlier' has the greatest deviation with -5%, which is still in the indicated range of the description even when the humidity. This Minus one can then just expect it mentally. Except for one outlier the remaining three devices in saline test with 75% absolute in the target (were with me as equipment I had in addition two digital devices of TFA, type 30.5027.01, and a Echthaarhygrometer All three are. In accordance with the saline test ( 75%) and the towel tests (95-98%) correctly). The hygrometer responds to changes a bit lame. I ask the Hygros sometimes directly to the open window to check whether ventilate at all makes sense, not the one the moisture vents located only inside. Here, the devices need to adjust minutes, which I think is a bit long.

The time can be displayed in 12 or 24-hour mode. Unfortunately, jumping date and time every few seconds back and forth. Better it would be if you could opt for either the time or date. In addition, the date format is such that the first month is then shown after the day, I find quite used to.

When the alarm function can be either an hourly or daily alarm can be set, or both.

The manual was in English only, but this was the deal there. The loud keys beep-tone have objected to several reviewers, bothers me less now, since one only once during commissioning must set the device and then again when changing the battery.

Conclusion: I can thoroughly recommend this 4-pack !! One must at the price of course compromising, but the price-performance ratio is still very good. The variations of temperature and air moisture of several devices of the same model, it has also in other digital devices. My already mentioned above, two of Thermohygrometer TFA have another similar deviations, only as a device costs as much as here together every four.