Item : 
GT POWER RC Model Profession Motor R/C Hobby Tachometer 

Feature:
An advanced yet economically designed tachometer that quickly measure rotation speed up to 99,999 rpm

- To measure RPM of a spinning propeller, 2-9 blades ones, memorize peak RPM datas.
- Peak RPM value up to 99999 per  minute!!!

Specifications:
-Sharp backlit LCD screen, applicable under poor light condition.
-220mah removable lithium button battery included.
-Compact & extremely portable.
-Automatically shutoff when signals are not detected within a muinute
-Dimension: 90 x 54 x 16mm
-Weight:39g
- Up to 99,999rpm

Package Content: 
1 x GT POWER RC Professional Tachometer