Features Mini: The portable digital tachometer is mini and easy to measure. The size of the speed precision measuring tester is 12*5.3*3cm / 4.72*2.08*1.18in, and the weight is about 116g/4.1oz (without battery) Convenient measurement: Mini non-contact digital LCD tachometer can avoid the contact between the instrument and the workpiece, which solves the problem of measuring some parts under test with small torque or easy deformation The principle of non-contact photoelectric speed: Tach rotate meter RPM meter adopts the principle of non-contact photoelectric speed, the light source is brighter, the area is smaller, and the measurement is faster and more accurate Large LCD screen with backlight: Non contact RPM tach speed meter has designed a large LCD screen with backlight, clear readings, and easy to measure in dark environments Multi-function digital tachometer: The digital tachometer has a measurement range from 10 to 99999 r/min, high accuracy, and supports automatic range, automatic shutdown, data retention, over-range display, low battery indication and other functions. Features: 1. Non-contact measurement can solve measuring problems of some tested objects which is easy to deform. 2. With wide measuring range from 10 to 99999 r/min and high accuracy. 3. Non contact RPM tach speed meter supports auto ranging, auto power off, data hold, overrange display, low battery indication and other functions. 4. The digital tachometer has large LCD screen with backlight, clear reading and convenient to measure in dark environment. 5. Automatically store max value and min value.   Specification: Measuring Range: 10~99999RPM Resolution: 0.1RPM (10~9999.9RPM), 1RPM (10000RPM or more) Accuracy: ±(0.04%+2) Counting Range: 0~99999 Measuring Distance: 50~200mm Battery: 3 x 1.5V AA Battery (Not included) Battery Life: About 40h Color: Red + Black Size: 12*5.3*3cm / 4.72*2.08*1.18in Weight: Approx. 116g/4.1oz   Packing list: 1 * Tachometer   Note: 1. Due to the difference between monitors and light effect, the pictures may not reflect  the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding. Package List