tractor hour meter high accuracy DC12V to 36V 1High Accuracy: The hour meter's timing mechanism contains a quartz oscillator to ensure a high degree of accuracy, indication range is 99999.9 hours; operating voltage is Dc (12?36)V. 2Multipurpose: Hour meter can be used for any other device where time is used to determine oil change intervals, service requirements or where there is a need to record hours operated. 3Sturdy Construction: Outboard engine hour meter is made from Abs and metal material, splash resistant, impact proof, not easy to break or crack. 4Applicable Models: Mechanical hour meter can be used for engines of ships, automobiles, trucks, tractors and other mechanical equipment. 5Portable and Easy to Use: Professional manufacturing, engine hour meter high performance, strong reliability, compact and lightweight, easy to carry and store.