Advanced linear digital plan measure with PC interface makes it easy to create linear area and volume takeoffs with speed accuracy and confidence when estimating bidding or planning. Ergonomic design is comfortable to hold and the dual LCD displays are easy to read. Provides transfer capabilities from plans blueprints maps and out of scale drawings. Features 91 built-in scales including 50 English units 41 metric and 8 custom for out-of-scale drawings for maximum versatility. PC interface transfers rolled values directly into commonly used spreadsheets or estimating programs. 7.2" x 1.6" x 0.6" overall size. Two 3-volt lithium (CR-2430) batteries included. Interface USB cable is 15 feet long and works with Windows 2000 XP and 32-bit Vista operating systems.