Harman Kardon NSA40ED-190200 Operation confirmed. Output: DC 19V, 2A Input: AC 100-240V 50/60Hz Terminals: (-) Outer diameter 5.5mm (+) Inner diameter 2.1mm Cable: Approximately 1.9m (90cm + 100cm) Included: ・AC adapter main unit ※No product box or instruction manual included. Shipping: Ships within 3 days of payment confirmation. Regarding installation support, returns, exchanges, and warranty: We are unable to provide support due to this being a private, used sale. Thank you.