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 cigarette.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 nowPackage includes: 1x Cigarette Lighter Socket + 1x Green LED Voltmeter + 1x Green Dual USB Charger + 1x Green Round Toggle Switch + 9 x Insulated Terminals + 4 x Screws (Not Included Connection Wires).Flexible design; DIY Four Hole Panel Base; Dual USB Socket + LED Voltmeter + 12V Power Outlet + Toggle Switch; Can be freely interchangeable, also can replace any port with additional USB outlets, or anything else that fits. Specification: Color: Black Material: ABS US