Non-contact High-precision Tachometer Digital Display Motor Speedometer Type:Motor Speedometer Material:Plastic Feature 1. Non-contact handheld digital tachometer with stable performance. 2. Automatic and manual measurement modes are available. 3. Wide measurement range (2.5 to 99999 RPM) and high resolution. 4. Data retention, data logging and recall (60 readings). 5. The LCD screen is white and easy to read. 6. Ability to measure within 2-20 inches (50-500 mm). 7. Low battery indicator. Product specifications 1. Resolution: 0.1RPM, 2.5~999.9RPM; 1RPM, 1000~99,999RPM 2. Accuracy: ±0.02% + 1 digit 3. Sampling time: 0.5s (120RPM or more) 4. Automatic shutdown: After 5 seconds 5. Operating temperature: 0 to 50 ° C (32 to 122 ° F), storage temperature: -10 to 60 ° C (14 to 140 ° F) 6. Operating humidity: 10 to 90% RH, storage humidity: 10 to 75% RH 7. Power: 1 section 9V 6F22 battery (not included) 8. Product size: 144x84.x35mm, weight: 78g