Features： 1、Multiple Functions: Dual system display, total time, single timing, maintenance reminder, speed, overspeed reminder, voltage, temperature, clock, backlight, replaceable battery and other functions. 2、Backlight Design: The digital tach hour gauge is designed with green backlight display, normal use in sunlight or low light conditions, with three modes: automatic, long bright, and backlight off. 3、Power Supply Method: digital tach hour meter is powered by built in button battery and external power supply, the battery can be replaced, long service time and convenient for using. 4、Easy to Install: Inductive tach hour gauge is equipped with hook and loop fastener and cable ties, you can directly fix the gauge without drilling. Then wiring according to the correct operation. 5、Usages: Widely used in garden machinery such as hand push lawn mowers, riding lawn mowers, chain saws, etc.; agricultural machinery such as branch chippers, weeders, seeders, and so on. Specification： Item Type: Digital Tach Hour Meter Material: ABS Power Supply Voltage: 8-30V Timing Range: 0-999999H Single Timing: 0-999999H Maintenance Range: 0-250H OFF Timing Accuracy: 1MIN/0.1H/1H Speed Range: 0-25000RPM Overspeed Reminder: 0-25000RPM Refresh Rate: 0.5S Battery: Built in 1PC button cell battery CR2450 540mAh Speed Accuracy: 10RPM Overpressure Reminder: 10-30V Temperature Range: -20℃ to 300℃ (-4℉ to 572℉) High Temperature Reminder: -20℃ to 300℃ Display Method: LCD Waterproof grade: IP65 Function: 1. Timing function Total time: record the total running time of the engine, and the total time cannot be reset. The timing range is: 0-999999H, the timing accuracy is 0-9999.9H is 1min, 10000-99999.9H is 0.1H, and 100000-999999H is 1H. Single timing: 2 groups, used to record the time of a single operation of the engine, which can be reset. 2. Maintenance reminder function The maintenance time can be manually set according to the maintenance requirements of the engine. The maintenance time is displayed in a countdown. Two groups of maintenance time can be set. The setting range is: 0-250H. The display accuracy is 1min. Reminder method: when the countdown is 0, SVC/SVC1 flashes, and the red backlight reminds 3. Speed function After the engine ignition signal is detected continuously, the main interface displays the current engine speed. Speed range: 0-25000RPM Suitable for engines with different ignition modes, 9 engine strokes can be selected, default 1P1R Overspeed reminder: The setting range is 100-25000RPM. When the speed exceeds the set value, the current speed will be displayed, and the red backlight will be on. 4. Voltage function: display the current voltage of the power supply in real time, you can set an overvoltage reminder or turn off this function Overvoltage setting range: 10-30V, when the voltage exceeds the set value, the current voltage will be displayed, and the red backlight will light up 5. Temperature function: The current temperature of the engine is displayed in real time, which can be viewed by pressing the button, and an over-temperature reminder can be set. The range of over temperature reminder is: -20℃ to 300℃ (-4℉ to 572℉), when the temperature exceeds the set temperature, the current temperature will be displayed, and the red backlight will light up. Two temperature units can be switched between Celsius and Fahrenheit. 6. Clock function: LCD displays the current time, and the display method is 24H. Application: Widely used in hand push lawn mowers, riding lawn mowers, chain saws and other garden machinery; rammers and other road machinery; water motorcycles, outboard motors and other marine industries; vehicle industries such as motorcycles, off road vehicles, ATVs, and snowmobiles; portable generators, RV generators and other generator industries; powered paragliders and other sports equipment; branch chippers, weeders, seeders and other agricultural machinery; and other gasoline engine equipment with spark plugs. Package List： 1 x Digital Tach Hour Meter 1 x Hook and Loop 6 x Cable Tie 1 x Manual 2 x Wiring