?The Flex Power Tools ADM 30 Laser Range Finder is perfect for the quick determination of dimensions on all interior areas. It is easy to use thanks to its simple operation and offers length and area calculation. The laser has an illuminated display and a dust and splash proof housing for tough onsite applications.It also offers a continuous measuring mode with switchable units of measurement in m/mm and feet/inches. It has an integrated, rechargeable Lithium-Ion battery that is charged via it?s USB port, for convenient battery charges.