Adapter that allows for connection of the power supply with the tip 5,5 / 2,1 mm with slot of type of microUSB. An adapter has no connected data lines so it is not suitable for powering iPhone, iPad, iPod etc. However, it can serve as an adapter to power Arduino and Raspberry Pi.
The adapter does not have built-in voltage regulator. Do not connect the power adapter 9 V or 12 V to the device that requires 5 V, as this may damage it.