-Sharp backlit LCD screen, applicable under poor light condition.

-220 mah removable lithium button battery included

-compact &extremely portable

-Automatically shutoff when signals are not detected within a minute

-Weight 39g

-Dimension;90X54X16mm

-ounts from 2--9 Blade Propellers

-Press’power’button for 1 second to power on/off

-Press’SET’button to set the relevant propeller blades

-Real time RPM value shown when you make the RPM

Sensor point to the blades within 10cm measurement distance

-Maximum RPM value are displayed when measurement is finished

-Backlit LCD are on/off when Press’SET’buttonfor 3 seconds uninterruptedly