The leica disto d2 measures heights and distances with quickly and accurately using laser measurement technology distances of up to 100m can be measured at the press of a buttonthe distotrade d2 will allow you to add and subtract measurements calculate area volume and also use pythag to calculate inaccessiblethe distotrade d2 also features bluetooth to link the machine to your tablet or smart phone via the leica distotrade sketch app with this app you can record measurements draw fl