Milwaukee® designed the 12 in digital measuring wheel to be the most efficient measuring wheel on the market, featuring the ability to control the tool with one hand using the handle mounted buttons and digital display. The backlit screen has an IP54 rating for durability and features a highly intuitive interface. The digital interface saves and stores up to four measurements, measure and convert in imperial, metric and engineer scales, as well as hold and clear measurements with just the touch of a button. The frame telescopes to multiple heights and is easy to store. This digital display measuring wheel takes (2) AAA batteries (included). Milwaukee® 48-22-5112 Digital Measuring Wheel, 0 to 10000 in Measuring, 12 in dia Wheel, 12-1/2 in OAL