PHC 9 Volt 3 Amp Power Adapter, AC to DC, 2.1mm X 5.5mm Plug, Regulated UL 9v 3a Power Supply Wall Plug AC Input: 100V to 240V, DC Output: 9 volt at 3 amp rating, UL, ROHS certified Type: Regulated switching power supply with 2.1mm x 5.5mm plug, center positive High quality commercial grade AC to DC power adapter for manufacturer of all type Please confirm the plug size before purchase Tips: voltage must equal to device requirement, amp rating must equal or greater than requirement