40m Digital Laser MeterFeatures: Instant measurement of distance, area & volume with one button operation: YES Wide measuring range: YES High accuracy: 2mm (0. 079inch) Automatic calculation of Area and Volume: YES Indirect measurement by Pythagorean Theorem: YES Single Continous measurement: YES Max Min distance tracking (display value): YES Easy Addition Subtraction of measurement: YES Set up front rear benchmark: YES Selectable meter(m), inch(in) and feet(ft): YES Data