1. Maximum detection depth: ferrous metal: 100mm, non-ferrous metal: 80mm, copper wire: 40mm, foreign matter: 20mm/38mm 2. Measurement accuracy: about 5mm 3. Unit selection: m/inch/ft 4. Measuring range (without reflector): 0.05-40m 5. Measuring time: 0.3-4 seconds 6. Laser type: 620-670nm 7. Self-closing laser: 20 seconds 8. Storage data: 30 sets of data 9. Automatic shutdown time: about 5 minutes 10. Screen: 1.8 inch color screen 11. Power supply: built-in 300mAh lithium battery 12. Working temperature: 0-40 degrees 13. Storage temperature range: -20 to 60 degrees 14. With single-function buzzer alarm function without data 15. Real voice, real-time broadcast for detecting metal (steel bars, copper pipes) and cables hidden in walls, ceilings and floors 16. Large-capacity lithium battery, USB charging Packing list: 1x multi-function instrument, 1x USB data cable, 1x user manual, 1x lanyard