Laser Distance Measuring Instrument High Precision Laser Ruler 1. Distance measurement range: 0.05-5070100m 2. Distance measurement accuracy: +-(2mm+d x 110000) 3. Laser type level: Class 2 630-670nm, less than 1mW 4. Number of stored records: 99 records 5. Automatic laser cutoff: 20 seconds (single measurement) 6. Automatic shutdown: 150 seconds 7. Maximum battery life: 40008000 times (carbonalkaline battery) 8. Storage temperature range: -20 degrees Celsius - 60 degrees Celsius 9. Operating temperature range: 0 - 40 degrees Celsius 10. Storage humidity: 20% - 80%RH 11. Battery used: 2 1.5VAAA batteries (not included) 12. Functions: continuous measurement, area and volume measurement, pythagorean measurement, addition and subtraction, area and volume addition and subtraction, maximumminimum value, self-calibration, sound prompt 13. Size: about 10.8 x 5 x 2.5cm 14. Weight: about 82g Packing list: - Rangefinder x 1 - Lanyard x 1 - Instruction manual x 1 - Storage bag x 1