1Waterproof Material: Made of ABS with epoxy resin encapsulated shell, waterproof, shockproof, withstands up to 85, this hourmeter and tachometer is durable and sturdy for long term use. 2LCD Display Engine Hour Meter: Records up to 9999.9 hours, maximum RPM range of 99999, standby time over 20000 hours with flashing indicator. 3Wide Application: Engine hourmeter is suitable for various mechanical equipment such as generators, vibrators, shredders, lawn mowers, motorcycles, cars, trucks, snowmobiles, and construction vehicles. 4Mini Hour Meter for Engine: Easy to install without battery, simply connect to sparking plug wire and fix with screws or cable ties. 5Details Specifications: Made of ABS material, the engine hour meter accurately tracks running time and RPM for maintenance and monitoring purposes. 1 x Hour Meter 1 x Wire 2 x Screws