Hour meter, Rev counter Large display back lit.

·  Track the Service Life of Your Engine - oil changes, valve, adjustments, spark plugs, etc...

·  Easy Installation - cable connects to spark plug wire.

·  Works on Any Gasoline Engine.

·  When engine is on, display current RPM, when engine is off, display 0 RPM.

·  Can test the voltage, range from 10 v to 30 v, when the voltage is low, will remind "!"

·  Can set the RPM, range from 200 RPM to 30000 RPM, when the speed is fast, will remind "!"

·  Multiply RPM types, can be set 1R1R,2P1R,3P1R,4P1R,6P1R,8P1R,3P2R,5P2R,1P2R.

·  Recall Max RPM

·  Maintenance service reminder, range from 1-250 hours, can be set freely

·  Total hour can not be rest to zero, partial hour is re-settable.

·  Battery is changeable, with memory storage.

·  Can restore the factory defaults mode.

·  Hour meter with back light Green

·  Hour meter with clock(24:00).

·  Surface waterproof IP68.

Battery is included but they have a short life span in the box with no use so you will need to replace in most cases CR2450 Price is adjusted for this.