The item is a portable and practical LCD display engine digital tach hour meter tachometer, which is applied to all the gasoline engines with the spark plug, such as motorcycles, motor boats, ATVs, lawn mowers, boat, etc. With inductive design, you just need to tie the cable to the spark plugs and then the item can work. Besides, you can set the mode for being applied to the 2-stroke or 4-stroke engines. With easy to install and operate, it is really a wonderful digital tachometer hour meter. Features - Color: Black.- Material: Plastic.- Size: Approx. 5x3.7x1.5cm.- and LCD Display Spark Plugs Engine Digital Tach Hour Meter Tachometer Gauge.- Applied to all the gasoline engine with the spark plug, such as motorcycles, motor boats, ATVs, lawn mowers, boat, etc.- Industion design: You just need to tie the cable to the spark plugs and then the tachometer can work.- It will show both engine RPM and hours of operation, reading up to 9999.9 hours /9999 RPMs.- Accuracy: 0.1 hour /10 RPMs.- Adopts large LCD screen for easy to read.- With system data reset function, you can remove all the recorded data.- Easy to install and convenient to operate.Packing list: 1 x timer