Advantages: 1. Industry's first rangefinder with Bluetooth 2. accurately measure the inclination 3. Single / Continuous measurement 4. 5. Countdown measure supporting tripod more professional and more precise measurements of up to 16 kinds of calculation functions 6. Features: 1 . Bluetooth 12. 2. Automatic vertical distance measurement data storage 13. Using an indirect measure twice Pythagoras 3. Automatic vertical distance measurement area twice the amount of Pythagoras 14. 4. 15. Countdown continuous measurement measuring 5. Single 16. measurements plus / minus 6. Data subtraction calculation function 17. 7. volume measurement Max / Min 18. ± 1 毫米 high precision measurements can accurately measure the angle of 19. 8. High-definition LCD display full-function keys 9. bottom, top and extension measuring 20.3 minutes to switch automatically enter power-saving mode, backlight display 10. loft measuring cumulative length measuring unit 21. The variety of settings 11. 22. Automatic horizontal distance measuring triangulation product parameters: Measuring range from 0.05 to 100 m Accuracy ± 1.5 mm Min display units 1 mm units of measurement meters, inches, feet laser level grade II635nm, the maximum output power <1mW dustproof IP65 waterproof and dustproof protection of data stored set of Bluetooth range 10 m 20 Battery 2 Section 1.5V "AA" laser automatically shuts off automatically 3 minutes 30 seconds angle measuring range ± 65 ° tilt sensor accuracy of ± 0.5 ° Product Size 135 * 58 * 33mm Weight 203g Application: Main widely used in coal mine tunnel measurements, terrain measurement, mine construction surveying, construction surveying engineering, mine rescue rescue, ventilation resistance measurement, safety supervision and law enforcement. Use sectors: ventilation department, geodetic department, ambulance brigade, well construction department, law enforcement supervisor coal, machinery and electrical sectors, tunneling and mining sectors, mining safety evaluation agencies.