This plug-in regulated power supply with 3-12 V DC switchable output has an LED indicator and selectable polarity. It comes complete with 8 adaptor plugs and an additional Female USB socket and Micro USB. Features include IC regulated DC output, short circuit protection and automatic overload cut off. The 8 detachable plugs are: 2.5, 3.5, 5x2.1, 5.5x2.5, 3.5x1.35, 4x1.7, 5.5x1.5, 2.35x0.75, Female USB Socket and Micro USB plug.