DIY Four Hole Panel Base; Dual USB Socket + Voltmeter + 12V Outlet + Toggle Switch. USB socket output: DC 5V / 4.2A; Power outlet: DC 12V; Voltmeter display range: 0 - 24V. Small size and excellent performance.Easy to install, convenient to use.Widely used for car, truck, Rv, ATV, boat, etc. About the switch hole, It could be used for a . Can Not be used to light cigarettes.If you don't need the switch for a while. So enjoy it depend on what you wold like it to be. It has two different use, why not ordering it now Widely used with electric equipment for power supply:Vehicle,GPS,DVR, mobile phone, camera. Tight cap of lighter socket protect the ports when not in use. Waterproof or Dustproof for the interior or exterior application. Fitment: Fit for many vehicles(Car,Boat,Motorcycle,Marine,UTV/ATV,RV,Truck, Vehicles) to install the dashboard area where use mobile Specifications: Color: Black Material: ABS Voltmeter socket dimension: . 2.8 * 1.6cm (Screw Diameter * Height) USB socket