Installation operation:<br> Wrap the end of the sensing wire around the spark plug tube 5 times, then secure it with a tie, then insert one end of the sensing wire into the groove on the back, find a suitable position and secure the watch with screws. Inductive Digital Hour Meter Waterproof LCD Display for Motorcycle ATV Snowmobile Boat Ski Gas Engine Non-Tachometer Model Features: new and high quality Track the life of vehicle oil changes, valves, adjustments, spark plugs and more. Easy to install Peel and stick No batteries required - attaches to spark plug wires Works with any gas engine Records and displays up to 9,999.9 hours Glass symbol appears and flashes on/off to indicate count time Auto-flip Resolution: 0.1 hour 100% epoxy encapsulated housing available Waterproof, shockproof, 85C fire resistant<br> Specifications: Item size: 54*36.5*14.5mm<br> Package contents: 1 x hour meter 1 x wire 2 x screws<br> About our company<br> We are Professional auto parts supplier. We provide high-quality goods and good services, you can buy with confidence in my store. If you have any questions, please contact us.<br> (1) Welcome