The PC Engine Duo („Turbo Duo“ in the USA) was the first system from NEC to combine the Add-Ons of the PC-Engine in one housing, enabling players to play HU-Cards and CD-Roms without extensions – Arcade-Card issues left aside. The console has a nice, clean yet premium Design and appearance. NEC follows this All-in-One approach with 2 more models: the Duo-R and the DUO-RX.