The many reviews about this product you need nothing more to add. I bought the machine, because I want to set up a vivarium for our association in an enclosed area and cause an incorrect measurement additional work and costs. I have previously measured the room with my wife with two folding rules and also with a steel measuring tape. The measurement was time-consuming and inaccurate, the results vary. The laser rangefinder all quickly across the stage and the shortest distance on the ceiling height was was well calculated. A follow-up of the measured length I did not do (to eventually be required calibrated tools), but I trust the manufacturer's instructions (tolerance 2 mm over the entire length). Who wants to measure only a few times a year and no more than 25 m, is well advised with this device and requires certainly no professional device.
