Bosch GLM 50 Laser Distance Measurer with 165-Feet Range and Backlit Display Precision Laser Measuring Technology - Measures up to 165-ft (50 m) and accurate to within 1/16-in (1.5 mm) Five Measurement Modes - Length, area, volume, continuous measurement and indirect length measurements for versatile applications Three Measuring Reference Points - From front or back of the unit, or center for use with optional tripod Automatic Backlit Display - For easy and convenient viewing Includes: GLM 50 Laser Measurer, Belt Pouch and Carry Loop, 2 AAA Batteries and Manual Class IIa laser product, &lt;1mW power output