1、Waterproof 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. 2、LCD Display Engine Hour Meter: Records up to 9999.9 hours, maximum RPM range of 99999, standby time over 20000 hours with flashing indicator. 3、Wide Application: Engine hourmeter is suitable for various mechanical equipment such as generators, vibrators, shredders, lawn mowers, motorcycles, cars, trucks, snowmobiles, and construction vehicles. 4、Mini Hour Meter for Engine: Easy to install without battery, simply connect to sparking plug wire and fix with screws or cable ties. 5、Details 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 Wire2 x Screws Item Type: Hour Meter Material: ABS Record up to 9999.9 hoursMaximum speed range is 99,999 RPMStandby time is over 20,000 hours