The Ermenrich Reel GK40 laser meter can be used for many construction, repair, engineering and household tasks. It enables accurate measurements within 40 meters, as well as the calculation of volume and area. For measurements in difficult conditions - when the measuring instrument cannot be placed correctly - there is the Pythagoras theorem function: it helps to calculate the distance to the desired point with indirect measurements. The device also has a spirit level, which can be used for accurate placement of the measuring instrument, but also as a separate tool.

The display shows 3 lines of data, and the results can be displayed in meters, feet or inches. Previous measurements are stored in enough memory for 20 groups. Power supply: AAA batteries; one set is sufficient for 5000 measurements. The automatic switch-off function helps to conserve batteries. The low battery level indicator indicates when the batteries need to be replaced.

- Distance, area and volume measurement; Pythagorean theorem function
- Measuring range between 0.05 and 40 meters
- Horizontal bubble level
- Sufficient memory for 20 measurement groups
- Automatic shutdown, low charge indication