Dual USB Fast Charger Socket, Waterproof Power Outlet 4.8A with LED Voltmeter+Wire Build in 10A Fuse DIY Kit for 12V/24V Marine Boat Golf Cart Truck Motorcycle More, Blue LED Display

12V Voltage Display ---Features Blue LED voltmeter monitories the 12V vehicle's battery and electrical system automatically and indicating the car voltage displayed, Rocketek dual USB charger socket will show you clearly the health of battery while driving, dark or at night.
Strong Compatibility---Well fits for DC 12/24V car, boat, marine, motorcycle, ATV, RV etc. 12v USB power outlet well charging Phone 8/ 8 Plus/ X/ 7/ 6S, Samsung Note 9/ Galaxy S9/ S9+/ S8/ S8+/ S7, iPad, and other USB accessories.
Safety Protection--Rocketek DIY USB CAR CHARGER certified by CE & ROHS with Over-load, Over-current and Short Circuit Protection to ensure charging safety, guard the safety of your devices.
Water & Dust Proof---With IP66 waterproof grade, water and dust resistance by a rubber USB cover, protects internal circuit, effectively enhance its lifespan.
Simply Installation---Dual USB outlet is great installed within 20 minutes: "+" is plugged into positive pole and "-" is put on negative pole. It can also be connected to an on / off switch to save energy power outlet.