The original D1. Simple, two-button operation. The Leica DISTO D1 is our most basic, easy-to-use laser distance meter for quick and accurate interior measurements. Turn the D1 on, press the ON/DIST button, and you have an accurate measurement. Accurate, far-reaching, and lightweight. With a range of 130 feet (39m) and accuracy to 1/16th of an inch (2mm), the D1 has you covered for basic indoor measurement tasks. Compact and lightweight, the D1 is perfect for measuring at awkward angles or while handling other tools. Typ. distance measuring accuracy 2.0 mm Range 0.2 up to 40m Measuring units m, ft, in X-Range Power Technology yes Distance in m of the laser dot in mm 10m 6 mm Display illumination yes Free software for Windows yes Free App for iOS and Android yes General data interface Bluetooth Smart Measurements