USB Male A 5V to 12V DC 5.5mmx2.1mm Step Up Power Supply Cable Universal Charger
1 X USB 5V to DC 12V Adapter Cable. The size of the for DC Connector is OD: 5.5 mm and ID: 2.1 mm. Input Interface: USB A Type Male. Output Interface: 5.5x2.1mm Plug (Inside the positive ,outside the negative).