I have purchase another measuring device (sonic) from the hardware / DIY store and find that it is very inaccurate, why is the Leica Disto different?
There are two types of devices on the market. Laser measuring and Sonic measuring devices. The Leica Disto is very accurate using pin point accurate laser light, the Sonic devices often found at DIY / Hardware use sound to measure the distances that has a greater level of inaccuracy, measures over shorter distances only and may easily offer false readings as the sound may bounce off objects or furniture. See articles section.