RELATED VIDEO ABOUT THIS ITEM 4in 1 DIY Toggle Switch Panel: Dual USB Socket Voltmeter 12V Outlet ON/OFF Toggle Switch. It’s convenient for installing and operating. Also detachable to replace other charger sockets or anything else that fits. Real-Time LED Voltmeter: The LED voltmeter shows accurate voltage status, and reminds you whether the voltage is at a normal level, more secure for driving. Also allows quick and easy usage in the darkness. Safety Guarantee: The wires were built-in 10A Fuse for overload protection. It can charge safely, without the risk of overheating or damaging devices. Multifunctional product with LED indicator light, perfect for travel use. Fits for 12-24V Cars, Trucks, Marine Boats, ATVs, RVs, etc. The USB socket with dual output 5V/2.1A,5V/2.1A charging port Package includes: 4 in 1 Toggle Switch Panel, 3 packs of connection wires, 9 insulated terminals, 4 Mounting Screws, 1 Wiring Diagram Dual USB Socket Voltmeter 12V Outlet ON/OFF Toggle Switch Nilight 4 in 1Toggle Switch Panel is combined with dual USB Socket Voltmeter 12V Outlet ON/OFF Toggle Switch. It’s convenient for installing and operating. Also detachable to replace other charger sockets or anything else that fits. Our Multi-Functions Panel provides over-heated, over-current, over-charging protection, and safety for normal use; This dual USB charger power socket is also smart to identify the most appropriate current for your device, ensuring a longer lifetime of your device. Package Include: 4 in 1 Toggle Switch Panel 4 Screws A Wiring Diagram SPECIFICATIONS Cigarette Lighter Socket This is a universal 12V cigarette lighter socket, which is mainly made of durable flame-resistant hard plastic material for safe use Input voltage: 12 – 24V DC Output voltage: 12V DC Dual USB Charger Dual USB charging ports with an output of 3.1 A enable you to charge 2 devices at high speed simultaneously. Input voltage: 12 – 24V DC Output voltage: 5V DC Output current: 4.2A (2.1A & 2.1A) Digital Voltmeter This voltmeter helps you keep an eye on battery voltage maintenance of the battery, extends battery life to prevent an accident caused by battery problems Voltmeter display range: 0 – 24V DC ON/OFF Toggle Switch This round toggle switch is available in a variety of styles made especially for 12-volt application Type: ON-OFF Working voltage: 12V DC Max current: 20A