Xinsite HT-522 LCD Digital Tachometer 100,000 PPM Non-Contact Speed Meter Features: 1. With laser aiming. 2. Maximum, minimum, average and data hold 3. There are 4 different connectors for contact measurement. 4. Non-contact and contact tests can be performed according to your needs. 5. With positioning technology. 6. High resolution and 5-digit backlit LCD display. 7. A wide range of measurement types, you can test rotation speed (RPM), reverse rotation, frequency (Hz), speed (metersminute, inchesminute, feetminute, yardsminute) and length (meters, inches, feet, yards). Product parameters: 1. Measuring range: contact 2 - 19999, non-contact 2 - 99999 2. Counting measurement range: 1-99999 3. Accuracy: 0.02%-+2 digits 4. Resolution: 0.1 or 1 5. Measuring distance: 50mm-600mm 6. Sampling time: 0.5 seconds (over 120 revolutions) 7. LCD display: 5-digit display 8. Measurement type: rotation speed (RPM), counting rotation (REV), frequency (HZ), surface speed (mmin, inchmin, footmin, yardmin) and length (m, inch, foot, yard) 30 data storage: 10 measurement maximum, minimum, instantaneous value 9. Battery: 9V battery (battery not included in delivery) 10. Operating temperature: 0 to 50 degrees Celsius 11. Storage temperature: -20 to 70 degrees Celsius 12. Size: 236 x 72 x 35mm 13. Weight: 218g