Profesional Laser Distance Meter 120m/393ft Laser Tape Measure Rangefinder with Single Continuous Volumes Area Pythagoras Measurement Modes Digital Range Finder USB Charging Specifications: Model: D3-50 / D3-70 / D3-100 / D3-120 (Optional) Material: ABS Measuring Range :  D3-50: 0.05m-50m D3-70: 0.05m-70m D3-100: 0.05m-100m D3-120: 0.05m-120m Measuring Accuracy: ±2mm Display Accuracy: 1mm Laser Class: Class II Laser Power: ＜1mW Area / Volume Measurement: √ Pythagorean Measurement: √ Addition and Subtraction: √ Storage Function: √ Continuous Measurement: √ MAX/MIN Measurement: √ Multi-line Display: √ Screen Size: 2.4 inches Waterproof Level: IP54 Operating Temperature Range:  0℃ - 40℃  Storage Temperature Range: -10℃ to 50℃ Battery: 3 * AAA batteries (Not included) Laser Auto-off Time: 30 Seconds later Machine Auto-off Time: 3 minutes later Item Size: 116 * 54 * 24mm / 4.56 * 2.12 * 0.94in Item Weight: 90g / 3.17oz Package Weight: 170g / 5.99oz Package Size: 15.5 * 11 * 5.8cm / 6.10 * 4.33 * 2.28in