PHC SW-131V 13.8 Volt 1Amp Power Adapter, AC to DC, 2.1mm X 5.5mm Plug, Regulated, UL AC Input: 100V to 240V, DC Output: 13.8 volt at 1 amp rating, UL 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