Iztoss 12-24V Digital Blue Voltmeter Cigarette Lighter Dual Socket USB Adapter Charger 4 hole Pane Base kit For Car Boat electric equipment Four Hole Panel Base.the panel size is:100x110mm/3.94x4.33",Material: ABS .Usually US delivery : 7-12 working days from Dispatch including Dual USB Socket + Voltmeter Meter + power socket with 4 screws and 4 Insulated Terminals Small size and excellent performance.Easy to install, convenient to use.Widely used for car, truck, motorcycle, for ATV and boat, etc. Widely used for car, truck, motorcycle, for ATV and boat, etc.