Yamaha ENG-METER-4C-01 Hour/Tach Deluxe Engine Meter Helps you keep track of your engine's operating hours Includes pre-programmed service intervals at 10 hours (initial) and every 50 hours thereafter Flash alert displays for a 2-hour period upon reaching the specified interval Hour meter and tachometer functions Operating temperature is -40-degrees Fahrenheit to 160-degrees Fahrenheit