-To measure RPM of a spinnning propeller, 2-9 blades ones, memorize peak RPM data.
-Peak RPM value up to 99999 per minute.
-Sharp backlit LCD screen, applicable under poor light condition.
- removable lithium button battery CR2032 （due to shipping restriction, battery is not included).
-Compact&extremely portable.
-Automatically shutoff when signals are not detected within 1 mimute.

Weight:39g
Dimension:90*54*16mm

1. press 'POWER' button for 1 second to power on/off.
2. Press 'SET' button to set the relevant propeller blades.
3. real time RPM value shown when you make the RPM sensor point to the blade within 10cm measurement distance.
4. maximum RPM value are displayed when measurement is finished.
5. backlit LCD are on/off when press 'SET' button for 3 seconds uninterrruptedly.

Inludes:
1 x Tachometer

Requires:
1 x button type battery CR2032 or similar (3V, diameter is about 20mm). 

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