SNDWAY Laser Rangefinder Infrared Measuring Ruler, Style: 40m Precision Version 1. Small and portable, the data is mastered in one hand, intelligent and easy to use 2. Human-machine interconnection, one key to wake up the smart assistant 3. Low distortion optical lens, greatly reducing the influence of ambient light 4. Mobile terminal design, 10 minutes on-site drawing 5. Bluetooth board: millimeter-level optical system, Swiss ST speed calculation chip, ROHM safety laser, horizontal screen large font design, multiple modes and units, wall speed measurement, Bluetooth data transmission, CAD3D drawing, flat floor plan, Software and hardware design, data cloud synchronization, sunshine analysis, knowledge protection APP permissions 6. Precise version: millimeter-level optical system, Swiss ST speed calculation chip, ROHM safety laser, horizontal screen large font design, multiple modes and units, wall speed measurement 7. Scope of application: distance measurement area volume measurement Pythagorean measurement Bluetooth drawing 8. Battery capacity: 3.7V 850mah 9. Power mode: USB charging built-in lithium battery 10. Temperature range: 0-40 degrees Celsius 11. Measuring range: 40 meters, 50 meters, 60 meters 12. Protection class: IP54 13. Use: measure horizontal and vertical 14. Charging power: 5w 15. Charging voltage: DC 5v 16. Charging current: 1A 17. Packing list: host, user manual, color box, flannel bag, data cable 18. Dimensions: 100.3x33.4x18.3mm 19. Weight: about 160g