• Compact and extremely portable

• To measure RPM of a spinning propeller, 2-9 blades ones, memorize peak RPM datas

• Sharp backlit LCD screen, viewable even under poor light condition

• Automatically shutoff when signals are not detected within one minute

• 220mAh removable lithium battery is included

• Come with a lanyard for easy carrying

Specification:

• Weight: 40g

• Dimension: 87mm x 50mm x 17mm

• Manufacturers ID: GTPRPM

• Working Way: Photo electricity

• Max. Indication: 99999

• Blade: 2-9

• Auto Turn Off: No signal for 1min

• Backlight: Yes

• Battery: 220mAh replaceable lithium battery (included)