[4 in 1 Design]- This multifunctional charge panel designed with 12v Dual USB Outlet & LED Digital Display Voltmeter + 12v Cigarette Lighter Socket + Dual LED Rocker Toggle Switch. They are interchangeable, you also can replace any port with additional USB outlets, or anything else that fits. [Intelligent Quick Charge 3.0]- This 36W 12v outlet socket is built-in dual Quick Charge 3.0 USB charging ports, will detect your devices and simultaneously charging 2 devices at optimal speed. up to 4X faster than conventional charging, better charging performance. QC 3.0 Backward-compatible with QC 2.0, 1.0, provides standard charging for non-quick charge devices. [Real Time LED Voltmeter]- The USB Outlet Built-in LED Voltmeter, real time monitories the vehicle’s battery and electrical system voltage, let you know the health of battery while driving. easy to check whether the connection is successful and allow quick and easy to find the usb position in the dark or at night. [Flexible