Product Features:

Waterproof Dual USB Charger Socket: Built-in dual USB Fast Charging Technology. Two ports output 5V/2.1A&2.1A (total 4.2A), that's enough to charge two devices simultaneously!
Multifunctional LED Display: It’s a voltmeter, display the voltage of vehicle's battery. Let you always monitoring the health of battery and peace of mind when drive; It's a subtle blue light, allows you easy find the device in dark; Moreover, it also can check whether the connection is successful.
Considerate Design: This USB Socket charger add a USB Cap specifically. You can not only read the voltage but also keep the dust out when the cover down. Really a good companion for your Car, RV, Boat, Marine or Motorcycle.
Overcharge Protection: Meets CE/ROHS certification, charges safely, without risk of overheating or damaging devices.
Waterproof & High Safety Standard Material: With IP66 waterproof grade, allows it do good job on boat! Adopted metal material, high temperature resistant, low temperature resistant, also has anti-flame-retardant properties, makes it a high safety standard product.

 Note:

1. The voltage reading will be visible only by connecting to the battery.
2. The voltage also can be read when the cover is engaged.
3. This USB charger socket does not support Qualcomm quick charge.

 Package Includes:

1 x Dual Ports USB Charger
2 x Blue Terminal

Note:
Please check as much as possible to make sure the item is the one that you need.
Please allow 1-10mm deviation due to manual measurement.
Due to light and screen difference, the item's color may be slightly different from the pictures

If you have any problems,please kindly email us and give us a change to help you before you leave any feedback,and we will get back to you within 2 working days,thank you so much!