ITEM NAME:52mm 8-32V Display Voltmeter Waterproof Set for Car Motorcycle Truck Boat Marine Description: Use 316L stainless steel, can be used for a long time, can be used in wet, acid and alkali.IP67 waterproof and dustproof grade. Input signal: 8-32V. To enable the gauge to work even under strong vibrations, there is a snap with the harness connector, which is the best and strongest connection.