Dedicated external PSU power supply Adapter, a switching power supply takes an AC 100-240V input, but rectifies and filters into DC first, is converted back into AC at some high switching frequency, steps down the voltage with a transformer, then is rectified and filtered into a  DC 9v 1A output. 

Power :AC 100-240V To DC 9v 1A

Power Plug Type: normal Plug

Output Plug Type: 5.5mm X 2.5mm

Applications:

SMPS Power Supply Adaptor For LED Strips, Routers, Arduino Projects,