1. All products with original packaging box, so that can protect the products well on the shipping way avoid damage.
2. The product does not contain the battery because of the limitation of the airline company.
 3. Warranty: All units are with Retail box. and we offer Long warranty period of 2 years,in two years will repair for free.
 4. Shipping Way: if you need it faster, you can choose Aliexpress standard shipping,also have China post airmail ! 

SMART SENSOR AR926 tachometer (RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a digital displays.

1. Applying the MCU and electrooptical technology, can perform contact measurement of rotating & linear rolling speed efficiently.
2. Wide measuring range and high resolution
3. Large LCD display
4. Automatically store for the MAX, Min and LAST value
5. Accessories convertible for differenet measurement
6. Equipped with convex channel lineal rate sensor, it is convenient for measuring the lineal rate of the wire, cable. ropes etc.
7. Low batery indication so you can know when need to charger the units
8. legant and easy to use.
9. Solid structure built with durable electronic elements and light ABS plastic house     

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