AR925 Digital Tachometer Contact Motor Tachometer RPM Meter LCD Tach Speedometer 0.05~19999.9m/min 0.5~19999RPM High Precision Features: 1. Contact test generator measurement response quickly, accurate measurement, contact measurement speed. 2. Keypad: Touch to select the desired function simple and easy to operate 3. Battery compartment: using No. 7 battery, energy-saving and durable, easy to replace the battery. 4. Large LCD display Digital display intuitive, accurate, clear handwriting so that you can see the data from any angle 5. Using microcomputer (MCU) 6. Wide measuring range, high resolution, large LCD display 7. Automatic data storage 8. Streamline appearance design, low power automatic prompt 9. ABS high quality plastic is strong and durable Specifications: Model: AR925 Material: ABS Display: LCD backlight display Measurement range: 0.5& 65374;19999RPM 0.05& 65374;19999.9m/min 0.2& 65374;6560Ft/min Resolution: 0.1RPM (0.5~99.9RPM)/1RPM (1000RPM or more) 0.01m/min(0.05~99.9m/min)/0.1m/min(more than 100m/min) 0.1Ft/min(0.1~999.9ft/min)/1ft/min(1000ft/min or more) Accuracy: ± (0.05% + 1 word) Sampling time: 0.8s (more than 60RPM) Power consumption: about 30mA Power supply: 3*1.5V AAA battery (not included) Operating environment: 0~50& 8451;/32~122& 8457; Storage environment: -10~60& 8451;/-14~140& 8457; Package Included: Carton packaging Host * 1 + manual * 1 + storage bag * 1 + accessories * 5