Features: New Tachometer Hour Meter For Motorcycle ATV Snowmobile Boat Gasoline Engine Brand new and high quality Tachometer / Hour Meter, with large LCD display Great for Cart Engines operating in the 25,000 + RPM range work on any 2 or 4 stroke gasoline powered engine. With Reset to Zero Hours function, the hour meter reads up to 10000 hours and then resets to Zero & The tachometer can read up to 99,999 RPM Programmable Maintenance hour setting with service Icon, a reminder when to change oil or other service With wrap black wire around sparkplug wire, can work on all spark ignition engines by selecting engine type using S1 and S2 buttons Splash Proof & Easy Installation Speed mode setting: Press and hold the S1 button for 4 seconds, the RPM icon will display, and the LCD display will display 01 (ignite the spark plug 2 times per rotation); 02 (ignite one ignition per rotation); 03 (other rotations); 04 (only display the time, not display Revolutions per minute). Once you have found your ideal spark plug ignition method, please release the S1 button, the LCD will flash for 8-10 seconds, and return to the total timing mode. The factory value is 02. Maintenance interval time setting: Press and hold the S2 button for 4 seconds, the number on the right half of the display will flash. And the SERVICE icon will be displayed. Press and hold the S1 button to automatically increase the number of flashing digits. After reaching the desired number, release the S1 button. Press and hold the S2 button for 1 second to add the next digit, and repeat the above steps until the interval time input is completed, unit: hour. Release all the keys, after 14-16 seconds, the LCD display will return to the total time mode. Confirmation of maintenance interval Press the S1 and S2 buttons at the same time for 4 seconds, the two numbers will increase to 09 and then return to the total time mode. Indicate the maintenance interval and confirm the start of work. When the service time of the engine start interval reaches 0, the SERVICE icon is displayed, indicating that the service time is up. To make the set interval time work, this step must be confirmed. Query of set interval time: Press and hold the S2 button for 4 seconds, you can check your maintenance interval time without any settings. If you want to set a new maintenance interval, please repeat steps five and six. That is, if you want to check the maintenance interval time, just press and hold the S2 button. Processing after the service time is up: After the engine is running, if the maintenance interval is up, the SERVICE icon will be displayed to remind the service. Press S1 and S2 at the same time to make the data from 01-09, the SERVICE icon will be turned off, the maintenance interval will automatically restore to the original set time, and continue to run. Package included : 1 x Tachometer Meter