Manufacturer: Nintendo Co., Ltd.
The 3D System consists of a pair of active shutter glasses and an adapter to connect them to the Famicom’s third-player expansion port. The glasses are connected to the adapter via dual 3.5 mm jacks. This allowed compatible games to display a stereoscopic image similar to that of the Sega Master System’s SegaScope 3-D Glasses. Games would play in conventional 2D until a “3D mode” was activated using the select button.