The DW033 Distance Meter uses laser technology to accurately measure the distance between the device and its target. The lightweight and compact rectangular design allows you to set the range finder onto materials such as windows, indoor & outdoor walls for easy measuring. The handheld device delivers (+- 3mm) millimeter perfect measurements. An easy to read digital LED screen displays readouts in both mm and inches which is powered by 2 supplied AAA batteries. With an operating range of 30 metres or 100ft the DW033 is not only a quick to use but the compact lightweight design allows storage in a pocket.