The product fully meets the specified Funktionsumpfang. Yet when I receiving the items he showed the temperature to partially incorrect. The figures partly blurred or were not displayed. However, this was not the logical portion of the device; the casing was screwed too tightly, so that an excessive pressure on the display congested. Ergo helped the rear four screws to loosen slightly. Since - 1A everything! Therefore 4 stars. Just by chance I came out. I almost namely returned the items. Now I am very satisfied!