12 VAC Transformer, 36VA, 2.1mm x 5.5mm Barrel Plug, 12vac 3a Power Adapter, Wall Mount Input: 120VAC, Output: 12VAC at 3 amp max. (36VA) Configuration: Wall Plug with 2.1mm x 5.5mm barrel plug (11mm length) Note: This is an AC to AC power supply, please make sure your device uses 12VAC input Please confirm the plug size before purchase Tips: voltage must equal to device requirement, amp rating must equal or greater than requirement