Class Ii Laser + and -.06" Accuracy Extra-bright Backlit LCD Display Wide-range & Bright Visibility In Any Environment Accurate Instant & Reliable Results Indirect Measuring With Pythagorean Mode Addition and subtraction Mode Continuous Measuring Auto-shutoff After 3 Min Of Inactivity Meters and inches and feet and feet Inches Selectable Dustproof & Splashproof (ip54) Requires 2 AA Batteries 120ft Range