Description EASY-TO-USE: Simple, user-friendly layout features two-button operation: one for measuring, one for rounding. ACCURATE: Features long range measuring with extreme accuracy and measures distances up to 100 feet to within 1/16 inch. Measures in meters, feet inches, with fractions or decimals. DISPLAY: Features a backlit display with large icons that allows measurements to be easily read, even in dark areas. Brighter than its predecessor, the GLM20. PORTABLE: This compact measurer is easy to carry and fits in your pocket. ROUNDING BUTTON: The button allows users to easily round the measurement result from 1/2 inch up to 1/32 inch. CLASS II LASER: 635 nm;