1Multifunctional digital LED temperature/tach/hour meter. Can be used for any 2stroke or 4stroke gas engine with up to 8 cylinders. 2With a powerful temperature system, RPM measurement system, timing system and some other unique functional designs. 3Supports measuring the current temperature, the maximum temperature and setting the overtemperature warning function. Allows you to set the temperature unit display, and the temperature sensor type can be selected. 4Supports measuring the current engine RPM, recording and viewing the engine's maximum RPM, setting overspeed warning function, RPM refreshed rate 0.5S, etc. 5Can accumulate the total operating time TOT, record part of the operating time JOB, and the maintenance timer can be freely set to 0200 hours SVC, etc. 6All data can be saved automatically. Easy to install, IP67 waterproof grade, sturdy and durable, long service life. Item Type: LED Digital GaugeMaterial: ABS Color: Black Battery: CR2032 button battery, 150mAh (built-in) Temperature Features: Current temperature reads from -40 to 300 / -40-572. Adjustable Temperature Unit: /MaximumTemperature is viewable and resettableTemperature Refreshed Rate: 8 Second Programmable Alert temperature with LED flashes alert service alarmsRPM Features: Display RPMs when engine is on RPM reads from 0 to 19,990 RPM with Maximum RPM Recall and RPM alert function, RPM accuracy is 10 RPM. Programmable alert RPM from 1000-19990 RPMs with RED LED flashes alert service alarms. The default alert RPM value is 8500 RPMs. RPM Refreshed Rate: 0.5 Second. Hours Features: Accumulating total running hours, Total hours cannot be reset. Total hours reads from 0 to 19,999 hours, Hous resolution is 0.1 hour. Record JOB hours, Job hours are resettable. Programmable maintenance interval time(SVC) is from 1 to 1000 hours with RED LED flashes alert service alarms. The default SVC is 20 hours. 1 x Gauge 1 x Connection Harness 2 x Screw 4 x Nut 2 x Gasket 2 x Cable Tie 1 x Manual