Brand: RadioShack. MPN: 273-1067. This adapter mates with Enercell and RadioShack branded DC and AC adapters allowing end user to select the best tip for their device and select the proper polarity. This Adaptaplug works with devices requiring a power adapter with a 1.1mm inside diameter and a 3.8mm outside diameter. Adaptaplug I tip is right-angle type for use with AC/DC power adapters SKU:ADIB01J8YUA76.