Handheld Range Finder Palm Size Laser Distance Meter Distance Measuring Equipment with Single/Continuous/Area/Volume/Pythagoream Theorem Measurement Mode Features: 6 Measurement Modes: the device has several modes for different measuring demand, including Single Measurement mode, Continuous Measurement mode, Area Measurement mode, Volume Measurement mode, Single Pythagorean Theorem Measurement mode, Dual Pythagorean Theorem Measurement mode. Level Bubble: design with 2pcs level bubbles on the bottom and the right for accurately leveling. Historical Data Review: the historical data range is from 0 to 19, you are freely to review or delete those 20 groups of measured data. Plus and Minus Function: available in Single Measurement mode, Area Measurement mode, and Volume Measurement mode. Power Saving Auto-off Function: laser point will automatically shut down if there is no operation after 30 seconds, and the device auto shut down in 180 seconds as well. Battery indicator show in the top right corner. Function & Practical Range Finder: mini palm size is very convenient e and carry around, and easy to operate by 5 soft push buttons, 1.6-inch screen with white on black clear display, buzzer switch on/off function.   Specifications: Model: S40 / S60 / S80 / S100 (Optional) Measuring Range: (optional) 40m: 0.05~40m 60m: 0.05~60m 80m: 0.05~80m 100m: 0.05~100m Measuring Accuracy: ±2.0mm Measuring Unit: m, ft, in Area Unit: m2, ft2, in2 Volume Unit: m3, ft3, in3 Material: ABS Laser Type: 620~690nm Laser Class: Class II, <1mW Historical Data Review: 20 groups Laser Auto off: 30s Instrument Auto off: 180s Operating Temperature: 0~40℃ Storage Temperature: -20~65℃ Power Supply: 2 * 1.5V AAA alkaline battery (NOT included) Item Size: 110 * 49 * 26mm / 4.33 * 1.93 * 1.02in Item Weight: 88g / 3.10oz Package Weight: 153g / 5.43oz Package Size: 16.8 * 11.5 * 4.3cm / 6.61 * 4.53 * 1.69in Package List: 1 * Range Finder 1 * Lanyard 1 * Manual (English)