PHC AC-1611A 16 VAC 1.25 Amp AC to AC Transformer, 20VA, 2.1mm x 5.5mm Barrel Plug Input: 120VAC, Output: 16VAC at 1.25 amp max. (20VA) Configuration: 2.1mm x 5.5mm barrel plug Note: This is an AC to AC power transformer, please make sure your device uses 16VAC input Please confirm the plug size before purchase Tips: voltage must equal to device requirement, amp rating must equal or greater than requirement