For the serious measurement work, the Stanley TLM165si is a smart choice. You use the robust but compact laser distance meter for calculating surfaces, volumes and distances up to 60 meters. These measurements can be carried out both from the bottom and the top, so that you can use it optimally in every situation. The TLM165si also has a Pythagoras function to carry out indirect measurements. All these data can then be easily exported via bluetooth to the Stanley Floorplan App, in order to make all kinds of spatial calculations and designs. Finally, the TLM165si can be attached to a tripod (not included), on which you place the laser distance meter anywhere in the room.