Buffalo LPS WA-24C12U Output: DC 12V, 2A Input: AC 100-240V 50/60Hz Terminals: (-) Outer diameter 5.5mm (+) Inner diameter 2.1mm This is a terminal commonly used for 12V devices such as ELECOM and BUFFALO routers. Included: ・AC adapter body ※ There is no product box or instruction manual. Regarding installation support, returns, exchanges, and warranty: We are unable to provide support due to this being a private, used sale. Thank you.