Wikipedia
Tronica
Tronica (a.k.a. Ronica) was a trademark brand manufacturing handheld LCD games during the 80s. Some of their machines used to be a combination of game, watch, alarm clock and calculator, much in the line of the Nintendo Game and Watch models, that became famous in that decade. Tronica manufactured about 45 different models of these machines, for example: Guard Wall, Air Fighting, Space Revenger, Space Mission, Stuka or Thief in Garden.