WATERWICH 5V 4.2A Marine Dual USB Car Charger Adapter Socket Waterproof with Led Digital Voltmeter For Universal Rocker Switch Boat RV Vehicle

Features: Power Input: DC 12V-24V USB Output Voltage: 5V Output Current: 4.2A Operating Temperature: -40 to 85? Product Dimension: 5.2cm x 2.5cm (2.05in x 0.98in) CE & ROHS certification with Overload, Over-current and Short Circuit Protection to ensure charging safety, meanwhile, built-in converse connection protection that ensures the circuit won't be burnt out if wrong wiring, Comes with front cap can protect the two charging ports from water drop,dust, etc Multifunctional product with Blue,Green,Red LED indicator light, perfect for night use. Easy installation: General size suitable mounting to any vehicles. Dustproof material can be used for the interior and exterior application. Combined dual USB interfaces and LED digital display voltmeter into a combo. With built-in intelligent voltage monitor, 2-in-1 voltmeter is able to show you an accurate voltage value at anytime while you're driving, helping you to easily notice the battery running condition. Apply to all USB charging mobile phones or other electronic products. Run multiple accessories at one time, very convenient and easy to use. Wide Operating Voltage Range:It is specially designed to steadily work at the operating range of 12-24 volt, suitable for most SUV, ATV, UTV, Scooter, Snowmobile, Street Bike, Car, boat, Marine, camper, etc. Note: Regarding the each usb port 2.1A, it meant the maxi ampere of each usb port is 2.1A, if your device has no 2.1A itself, you use the ammeter could not test 2.1A. and you can use the device has 2.1 itself, for example: you can use ipad to test it, it can prove each usb port is 2.1A. Charging wire will also affect the charging speed,The original charging wire inside the copper wire is more than ten will directly affect the charging speed,Please check wheather your charging wire is original.