Laser Distance Meter，Aluminum Alloy Housing and Rechargeable Battery Mini Size, easy to carry Single measure and Continuous measure Measure Distance, Area and Volume by one device Un-directly Measure by Pythagorean Theorem Range:40m/50m/60m/70m 110g without Battery Product Name Portable Laser Distance Meter Model M-C Multiple Measurement Modes Distance/Area/Volume/Single/Max&Min/continuous measurement and indirect measurement by Pythagorean theorem Operation Temperature 0～40°C / 32～104°F Storage Temperature -20～60°C / -4～140°F Single Measurement Yes Laser class class II,650nm,＜1mW Dust & Splash Proof IP 54 Protection Accuracy ±2mm Self-calibration Function -7mm to ±7mm Backlight Time 15s Laser Lasting Time 15s Auto Power Off Time 45s Measure Unit ft./in./m Measuring Range of Laser Distance Meter 40m/50m/60m/70m measure time 0.3-4s Display lighting White LED Power 180 mAh polymer battery/5000 times Certification CE，FCC