THE LEICA DISTO IS A DISTANCE METER OPERATING WITH A CLASS 2 . THE D1 IS PERFECT FOR QUICK AND ACCURATE INTERIOR MEASUREMENTS. WHETHER YOU ARE MEASURING FOR INTERIOR CARPENTRY FLOORING HANGING PICTURES ON A WALL OR JUST CHECKING TO SEE IF THE FURNITURE YOU'RE LOOKING AT ONLINE WILL FIT IN YOUR HOUSE THE D1 HAS YOU COVERED. FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" SIMPLE TWO BUTTON OPERATION. UNWAVERING ACCURACY TO 1/16 OF AN INCH (2MM). 130 FEET (40 METERS) RANGE BLUETOOTH CONNECTIVITY- EXTENDED FUNCTIONALITY WITH DISTO SKETCH AND OTHER APPS