1. Contact measurement range: 3-19999RPM, 0-99999m, 0-1999.9m/min, 0-9999.9ft/min
2. Contact accuracy: 0.1%FS+1RPM
3. Speed ??display: 6-digit display, up to 99999
4. Effective measurement distance: 50-500mm
5. Measurement method: contact
6. Sampling time: 0.8 seconds (above 60 rpm)
7. Operating environment: -10 to 50 degrees Celsius, relative humidity within 80%, indoor altitude less than 2000m
8. Storage environment: -10 to 50 degrees Celsius, relative humidity within 70% (remove the battery)
9. Power supply: 2 x 1.5V AAA (R03/LR03) batteries (not included)
10. Display screen size: about 34 x 31mm
11. Size: about 146 x 59 x 29mm
12. Weight: about 117g

Features:
1. Semiconductor laser sensor, effective measurement distance 50mm-500mm
2. Can lock the maximum value, minimum value and real-time value during the measurement process
3. High-definition large screen display with white backgrou