This high quality AC to DC power supply is "wall wart" type, featuring short circuit protection, over current protection and efficient AC to DC conversion over 80%. It is a universal electronics power supply which also can be applied to power Arduino.
Wall mount type
Short circuit protection
Over current protection
Conversion efficiency more than 80%
Rated Input: 100-240VAC~50/60Hz 0.5A
Rated Output: 12V/1A
Connector: 5.5x2.1mm center positive barrel
Certifications: CE, CCC, Rohs
Cable Length: Approx. 110cm
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Is what it is Its a power adaptor...what else can I say about it?