Wireless vibration hour meter---- This is a liquid crystal hour meter that works through the vibration of the device but does not have a wired connection; It is suitable for almost all types of gasoline/diesel engines, AC/DC/battery powered equipment, etc. Total hours ---- When a vibration signal is received , it tracks the total operating hours, with readings up to 99,999 hours. Waterproof Design ---- Which is very waterproof and can keep it in good working condition at 10 meters underwater, up to IP68. Installation --- You can install it in any suitable position of the motor by screwing it and get the motor working signal by cutting easily the wire spool of the telecommunication wire. Others---- Applicable vibration frequency>4Hz; Built-in CR2430 battery, long standby life; This hour meter is suitable for outdoor electrical equipment, vehicles, generators, agriculture, boats, construction machinery, etc. such as: Lawn Mower, Garden Tractor, Riding Mower, Leaf Blower, Pressure Washer, Chainsaw, Chainsaw, Snow Blower, Brush, Trimmer, String Trimmer, Pressure Washer, Portable Inverter Generator, Motorcycle, Dirtbike .