The Aquaprova Tachometer is an amazing tool for 2 and 4-cylinder PWC.

Features Include:

• Waterproof digital gauge
  
• Clear digital letters and simplified design for easier use
  
• Large action switches for easy operation
  
• On/off sub-incandescence display
  
• Guage size: L 78MM X W 40MM X H 20MM
  
• LED Lighting and bar graph display
  
• Indicates 0 - 19,999 RPM
  
• The display refreshes every 0.3 or 0.6 seconds
  
• Voltage display function
  
• Operate with 12 volt battery