MACHSWON 100-30000RPM Chainsaw Tachometer Tach Gauge Digital Display Pulse Speedometer for Chain Saw Cropper Generator Lawn Mower RV ATV Dirt Bike Motocross Boat

• Measure RPM of fuel or gasoline engines up to 8 cylinders with this versatile tachometer. Keep track of engine timing and enjoy unique functional designs.
• Save energy and power with automatic display shutdown when the engine is not running. The tachometer automatically starts testing when the engine is running.
• LCD liquid crystal display, low voltage design, and built-in button power supply for safe and reliable operation.
• Easily measure RPM by attaching the electronic wire to the electronic meter and using the metal clip on the spark plug wire sheath.
• Suitable for a wide range of gasoline-powered machinery and equipment including chainsaws, lawn mowers, motorcycles, cars, generators, and more!

SPEED MODE SETTING: Step 1: Long press and hold the (SET) key, the screen will show 01, 02, 03, 04 in turn; (screen 01, 02, 03, show the speed mode corresponding to various engine strokes respectively) factory default value is 02 speed mode. Step 2: Finger release the button will display data flashing for 3 to 5 seconds to stop after confirming the start of the RPM mode, you can measure. HOW TO SHUTDOWN: Step1 : Press and hold the (SET) key, the screen will display 01, 02, 03, 04 in sequence; Step2: After the screen displays 04 when flashing for 3 to 5 seconds to stop; Step3: Confirm to start the system reset mode, press and hold the (MODE) key and (SET) key at the same time until the full screen display (The recorded working time and speed，the data is cleared to zero). Press and hold the (MODE) key to view the historical high RPM data.