Hour Meter ---- Contains tachometer, hour meter, service meters; helps you track the number of hours you have spent on your engine. Total hours can be reset; 0.1 hour accuracyMAINTENANCE REMINDER ---- Programmable maintenance timer (SERVICE), countdown maintenance reminder time; When the maintenance time comes, the service warning icon will flash to remindTACHOMETER ---- Accurately records your RPM when the engine is running, helps to adjust the engine idle speed; can be programmed for different engine firing modesREPLACEABLE BATTERY ---- Replaceable CR2450 internal battery, data retained after battery replacement; When the engine is stopped, the meter will automatically turn off after 2 minutes; press the button to read the display, data retained after shutdownOTHER ---- Easy to install; Waterproof Rating: IP65;CE ROHS certification, 2-year warrantyPowerLeader RL-HM011A Standalone Digital Engine Maintenance Reminder Tachometer contains a tachometer, hour meter, service timers, replaceable battery and waterproof design Product Features: Hour Meter (HOURS) Features ---- Lets you know how many hours you have spent on your engine. When the engine is off, the display shows the total running time of the engine. and remains visible. Total Hours reading displays 0 to 99,999 hours, 0.1 hour accuracy, Total hours can be reset 2 Service Timers (SERVICE) Features ---- Countdown tracking time, Maintenance reminder, Air filter replacement similar Programmable maintenance interval time from 0 to 999,999 hours When the maintenance time comes, the service warning icon will flash to remind you Countdown tracking service reminder number, 0.1 hour accuracy 3 Tachometer Functions ---- The display shows the current engine speed, helps to adjust the idle speed of the engine Accurately records your RPM when the engine is running Can be programmed for different engine firing speeds. The tachometer displays speed from 0 to 25,000 RPM and 10 RPM resolution RPM update time update rate: 0.5S 4 Other Features Replaceable CR2450 internal battery, Data retained after battery change. When the engine is stopped, the meter will automatically turn off after 2 minutes; press the button to read the screen, data retained after shutdown Note: Due to manual measurement, the size may have an error of 2 cm/1 inch; due to different displays and angles, the color and size may be slightly different, thank you for your understanding! AAFGVC welcomes your purchase! We look forward to showing you your shopping experience. Our service: We strive to provide customers with high-quality products and services. If you can't find the suitable size or size, please contact us by email to find a link for you, or you can contact us by email to change the size or size after placing the order. We will reply to your emails as soon as possible within 24 hours. We also warmly welcome you to our store to purchase and products. Thank you for your support.