Feature:1. Basic Functions: the laser distance meter including functions of single measurement, Max./Min. measurement, continuous measurement, area/volume/pythagoras measurement, addition and subtraction.2. Historical Data Storage: can store up to 20 groups of the measured value for further analysis and reference.3. Measurement Reference Switching: the default setting is rear edge measurement, you can change it to the front measurement reference.4. Measurement Units: easy to switch among m(default), ft, in.5. Low Power Consumption: powered by 2pcs 1.5V AAA battery, with battery indicator. 180s instrument automatic switch off, and 30s laser auto-off, both are power saving.Specification:Features:Basic Functions: the laser distance meter including functions of single measurement, Max./Min. measurement, continuous measurement, area/volume/pythagoras measurement, addition and subtraction.Historical Data Storage: can store up to 20 groups of the measured value for further analysis and reference.Measurement Reference Switching: the default setting is rear edge measurement, you can change it to the front measurement reference.Measurement Units: easy to switch among m(default), ft, in.Low Power Consumption: powered by 2pcs 1.5V AAA battery, with battery indicator. 180s instrument automatic switch off, and 30s laser auto-off, both are power saving.Specifications:Measuring Range: 40M / 60M / 80M / 100M (Optional)Material: ABSMeasuring Accuracy(standard deviation): ±2.0mmMeasuring Unit: m, ft, inArea Unit: m2, ft2Laser Type: 620~690nmLaser Class: Class II, <1mWSingle Measurement Time: 0.25sHistorical Data Record: 20 groupsLaser Auto off: 30sInstrument Auto off: 180sOperating Temperature: 0~40Storage Temperature: -20~65Power Supply: 2 * 1.5V AAA battery (NOT included)Item Size: 118 * 50 * 26mm / 4.65 * 1.97 * 1.02inItem Weight: 77g / 2.72ozPackage Weight: 141g / 5.01ozPackage Size: 16.5 * 11.5 * 4.2cm / 6.50 * 4.53 * 1.65inPacking List:1 * Distance Meter1 * Lanyard1 * Manual (English)Package List:1 * Distance Meter1 * Lanyard1 * Manual (English)