Electronic Measuring Wheel, 4 Ft, 99, 999FtMfr #: MP401E Swan Neck ergonomic handle. our patent pending thumb up grip ensures less wrist strain and superior control Dust, dirt and other particles can disrupt a light beam used in competitive units, our magnetic pick up avoids these problems Sealed counter encasement Counter size and placement Calculates area, and stores readings in 8 memory storage fields