Feature:1. 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.2. Level Bubble: design with 2pcs level bubbles on the bottom and the right for accurately leveling.3. 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.4. Plus and Minus Function: available in Single Measurement mode, Area Measurement mode, and Volume Measurement mode.5. 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.6. Function \u0026 Practical Range Finder: mini palm size is very convenient to use 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.Specification: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 to use 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: 0.05~40m60m: 0.05~60m80m: 0.05~80m100m: 0.05~100mMeasuring Accuracy: ±2.0mmMeasuring Unit: m, ft, inArea Unit: m2, ft2, in2Volume Unit: m3, ft3, in3Material: ABSLaser Type: 620~690nmLaser Class: Class II, <1mWHistorical Data Review: 20 groupsLaser Auto off: 30sInstrument Auto off: 180sOperating Temperature: 0~40Storage Temperature: -20~65Power Supply: 2 * 1.5V AAA alkaline battery (NOT included)Item Size: 110 * 49 * 26mm / 4.33 * 1.93 * 1.02inItem Weight: 88g / 3.10ozPackage Weight: 153g / 5.43ozPackage Size: 16.8 * 11.5 * 4.3cm / 6.61 * 4.53 * 1.69inPackage List:1 * Range Finder1 * Lanyard1 * Manual (English)Package List:1 * Range Finder1 * Lanyard1 * Manual (English)