The Jupiter Ace was a small machine at only 215 x 190 x 30mm with a vacuum formed case held together by plastic rivets. The computer is built round the Z80A processor at a clock speed of 1 MHz with an 8k ROM containing the Jupiter's FORTH language and 3k of RAM expandable to 51k and a Black & White display that was capable of displaying 32 characters on 22 rows and graphics of 64 x 48 pixels.

The rubber key pads of the keyboard were quite poor and needed to be pressed in the middle to work. The Interfaces include, TV, Cassette and 2 edge connectors