Sea-Dog Round USB USB-C Power Plug w/Voltmeter [426514-1]Round USB & USB C Power Plug with Voltmeter USB 3. 0 & USB C Power Plug with Volt Meter charges two devices simultaneously while the LED screen displays voltage status. Can be used on a boat, car, or RV. The total output 6A load is split 3A per side as needed. USB 3. 0 features Quick Charging (QC) for supported devices, giving enough power to charge phones, pads, and tablets quickly and efficiently. USB C features Power Delivery (PD) for faster and