DMiotech Laser Distance Measure 196ft 60m Mini Handheld Digital Laser Distance Meter Rangefinder Measurer Tape Red with Tripod Class II,&lt;1mW power output,Emitted wavelength: 635nm-650nm.Easy addition / subtraction of measurement. Set up front / rear benchmark. Switchable among metre (m), inch (in), feet (ft). High accuracy and wide measuring range up to 60 Meters. Min / Max distance tracking (display value). Quick measurement of distance, area and volume with one button operation. Indirect measurement by Pythagorean theorem. Automatic calculation of area and volume. Auto correction and error report technology. Large LCD with backlight. Widely used in construction and industries, especially in large areas such as rooms, apartments, buildings, real estates, factories, warehouses, etc.