Thlevel Dual USB Car Charger Power Outlet Socket 5V 4.2A with Switch for 12V 24V Boats and Marine Motorcycle Truck

5V/4.2A Dual USB Car Charger: Dual USB charging ports with single output of 2.1 A enables you simultaneously chargers 2 devices at high speed With Safe Power Switch: Designed with On / Off switch for energy-saving and devices protection, expanding lifespan of devices. It conserves electricity and doesn't drain any power when switched off LED Voltage Display: LED digital voltage monitoring function helps to monitors the health of your vehicle's battery and electrical system in real-time High Safety Standards: Protects your devices from over-current. Built-in fuse for over-load, over-heat, over-voltage, under-voltage and short-circuit protection Waterproof and Heat Resistant: Made of super Nylon materials with IP66 waterproof grade, the USB charger socket does well on high and low temperature environments ( -40°F to 140°F). Ideal for car, motorbike, boat and marine