Hour Meter ---- Contains tachometer, hour meter, service meters; helps you track how many hours you have spent on your engine. The total number of hours can be reset; 0.1 hour accuracy MAINTENANCE REMINDER ---- Programmable maintenance timer (SERVICE), countdown maintenance reminder time; When the maintenance time comes, the service warning icon flashes to remind SPEEDOMETER---- Accurately records your RPM when the engine is running, helps to adjust the engine speed idle; can be programmed for different engine firing modes REPLACEABLE BATTERY----Internal replaceable CR2450 battery, data retained after battery replacement; When the engine is stopped, the player will automatically turn off after 2 minutes; press button to read screen, data retained after shutdown OTHER ---- Easy to install; Contains detailed instructions for use; Waterproof rating: IP65; Patent, CE ROHS Certification, 2 Year Warranty Product Description The PowerLeader RL-HM011A Self-Contained Engine Digital Maintenance Reminder Tachometer contains a tachometer, speedometer, hours, service timers, replaceable battery and waterproof design Product Features: Hour Meter (HOURS) Features ---- Lets you know how many hours hours you have spent on your engine. When the engine is off, the display shows the total time the engine has been running. and remains visible. Total Hours Playback displays 0 to 99,999 hours, 0.1 hour accuracy, Total Hours can be reset 2 Timers Service (SERVICE) Features ---- Countdown tracking time, Maintenance reminder, Air filter replacement similar Programmable maintenance interval time from 0 to 999,999 hours< /p> When the maintenance time comes, the service warning icon will flash to remind you Countdown tracking service reminder number, precision 0.1 hour 3 Tachometer Functions----Display shows current engine RPM, helps to adjust engine idle speed Accurat ely records your RPM when the engine runs Can be programmed for different engine firing speeds. Tachometer displays speed from 0-25,000 RPM and 10 RPM. resolution Update RPM Time Refresh Rate: 0.5S 4 Other Features Internal replaceable CR2450 battery, Data retained after changing the battery. When the engine is stopped, the player will automatically turn off after 2 minutes; press button to read screen, data retained after shutdown