FUNCTION: wireless vibration hour meter track the service life of all non-engine applications, automatic vibration activated recording SUITABLE FOR: this universal waterproof vibration hourmeter is applicable for diesel/electric motor engine APPLCIATION: hour meter used for diesel engine motors,such as lawn mower, tractor, truck, trailers, motors, equipment, machinery, etc EASY TO INSTALL: vibration hour meter is easy to install, just peel and stick, no wiring necessary, or attach with enclosed hardware POWER SUPPLY: no power required waterproof hourmeter features sealed waterproof lifetime battery The hour gauge is used to track engine run time for all types of engines activated by equipment vibration. No complicated installation, the digital hour meter is wireless and vibration activated. Removable for a variety of occasions you need. Fully sealed, completely waterproof, the digital hour meter can be used safely even in rainy days. Features Vibration Hour Meter -Color: Black. -Material: Plastic. -Size: 5.35x3.62x1.46 cm/2.11x1.43x0.57 inch. Item Color: Black Resolution: 0.1 HRS Rec/Display to : 99,999 HRS Operating Temperature: Standard -30 to +85 Operating Battery Life: over 2 years Parts: 2 screws Gross Weight: 53g, net weight: 36g Applicable Engine Type: Diesel/Electric Motor Package Including 1 * Vibration Hour Meter