Master Tech

Master Tech is a line of video game console controllers, accessories and peripherals sold by the J&C Britton Company at Britton's and Hudson's stores.

History
In 1982, Britton's launched the Master Tech series of peripherals, launching with controllers for the and. It's Intellivision controllers plugged into the same slot as the module (a special "splitter" adaptor was sold by Britton's to allow Intellivoice owners to use it and a Master Tech Intellivision controller at the same time).