SNDWAY Double Horizontal bubble Rangefinder Laser Distance Meter Range Hand Tool Device SW-TG50 Instant measurement of distance, area & volume with one button operation: YES Self Calibration: YES Wide measuring range: YES High accuracy: ±2mm (0.079inch) Automatic calculation of Area and Volume: YES Indirect measurement by Pythagorean Theorem: YES SingleContinous measurement: YES MaxMin 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 store recall function: YES Data Hold Data clear function: 30 units Air Bubble Level: YES, Included Easy targeting with bright laser pointer: YES Large LCD with backlight and multi-line display (4 lines): YES Auto correction and error report technology: YES Buzzer indication: YES Battery status Indication: YES IP54 protection (dust & splash proof): YES Auto Manual power off function: YES Multifunction with intelligent calculation: YES Compact & handy design: YES CE, ROHS, FCC certificate: YES