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usb type c pd charger charge devices that support power delivery at up to 18w. intelligently identify your device like google pixel 3/3 xl/2/xl/2 xl/c/nexus 6p/5x and deliver the fastest and most efficient power. 3. digital led voltmeter-built-in voltmeter provides a fast and easy way to show the car battery status in the screen. led luminous digit figure for checking the data at night or in darkness. note: the digital led display only works when you connect it with battery.