Adventure Vision by Entex was released in 1982. There are only four games released for the system and conveniently there are exactly four holders to house them on the top of the unit. On the right side of the unit there is a port for headphones and at the back there is a port for an AC adapter to give power or the player can use four D batteries instead. Considering it's size, it's quite light. What make the system truly unique is the technology used for the display. Adventure Vision uses a strip of LED lights and a motorized double sided spinning mirror which results in a red 150x40 pixel display, with 50 fps (fifty frames per second).
Space Force was the only game that was developed in-house by Entex. The other three are Defender, Super Cobra and Turtles.