1. Brake switch material: ABS 2. Laser type: 630-670nm 3. Laser off automatically: 30 seconds 4. Dimensions: 85x56.3x81.5mm 5. Weight: 300 grams 6. Tape measuring range: 5 meters 7. Applicable to: house construction, interior decoration, floor tiles, etc. 8. If there is no operation for about 3 minutes, it will automatically shut down to save power 9. The tape is made of steel, which has good toughness and ensures smooth shrinkage of the tape 10. Double-sided scale, equipped with magnet suction up to 900 grams 11. LCD large screen display, clear readings, data at a glance 12. LM40 is powered by two AAA batteries (not included), continuous battery life, with a Phillips screwdriver for easy disassembly 13. LM50/LM60 built-in 350mAh lithium battery for power supply, with USB charging interface 14. Optical lens, accurate measurement, stable performance of laser module 15. Can store 20 sets of data 16. Multiple unit switching, short press to switch (m/ft/in/ft+in) 17. With automatic locking function, easy to use without hurting hands 18. A variety of measurement density, continuous, area, volume, Pythagorean measurement, etc.