SNDWAY SW-DS50 Handheld Laser Rangefinder Infrared Laser Ruler 1. Good phase optical linearity, accurate and stable 2. Waterproof and dustproof, 1.5 meters anti-drop, one-piece molding 3. Aspherical optical lens, excellent low distortion and anti-interference performance, greatly reducing the impact of ambient light 4. HD backlight, easy to use in dark environment 5. Measurement mode: length area volume Pythagorean angle measurement height measurement wall speed measurement 6. Measuring range: SWDS50: 50 meters, SWDS70: 70 meters, SWDS100: 100 meters, SWDS120: 120 meters 7. Scope of application: indoor ranging measurement, lengthheight measurement, infrared ranging 8. Working voltage: 3v 9. Working current: 1.6A 10. Working power: 4.8w 11. Packing list: host, manual, color box, carrying bag, reflector, lanyard 12. Power supply mode: 2 AA batteries (not included in the product) 13. Protection class: IP54 14. Dimensions: 11.2 x 5 x 2.5cm 15. Weight: 200g