Chess computers have come a long way over the years. The DGT Centaur, Chessnut Air, and Square Off are all powerful chess computers with super strong engines. Most of them are not travel friendly though. The Fidelity Travel Master Model 6122 is a foldable chess computer from 1991. It has an advertised rating of 2100 ELO. It has a press sensory board and 64 levels.
This chess computer has 2000 positions in its opening book. Frans Morsch was the programmer for this chess computer. The Fidelity Travel Master can play against itself. It also lets you play against a human opponent on it.