1. Measuring range: non-contact: 3-100000RPM; contact: 3-19999RPM, 0-99999m, 0-1999.9m/min, 0-9999.9ft/min
2. Accuracy: non-contact: 0.05%FS+1RPM; contact: 0.1%FS+1RPM
3. Speed display: 6-digit display, up to 99999
4. Measuring distance: 50-500mm
5. Measuring method: TA500A: non-contact; TA500C: non-contact/contact.
6. Sampling time: 0.8 seconds (above 60 rpm)
7. Operating environment: -10 - 50 degrees Celsius, 80% relative humidity or less, indoor altitude of less than 2000m
8. Storage environment: -10 - 50 degrees Celsius, within 70% relative humidity (remove batteries)
9. Power supply: 2 x 1.5V AAA (R03/LR03) batteries (not included)
10. Display size: about 3.4 x 3.1cm
11. Dimensions: TA500A: about 13 x 5.9 x 2.9cm; TA500C: about 14.6 x 5.9 x 2.9cm
12. Weight: TA500A: about 110g; TA500C: about 120g

Features:
1. Semiconductor laser sensor
2. Can lock the maximum value, minimum value and real-time value during the measuring process
3. Large HD display with white background lighting
4. 15 minutes without operation after the automatic shutdown (can be canceled manually)

Packing list:
- Main unit x 1
- Reflective paper x 2
- Instruction manual x 1