An official raspberry pi power supply, it has the raspberry pi logo embossed in the case. My 3b+ started giving me power warnings, I guessed it was the power supply as nothing else had changed, a branded switched supply from a rival pi supplier in use for about 18 months. This was the least expensive official supply I found and being uk specific there are no wasted parts that the multi region version has. I'm reassured as it is an official supply and as there is no switch, I now use a switched 4-Gang extension to power on and off. Great service from Okdo, I will be happy to order from them again in the future.