Here is another portable chess computer that can give you a fun game anywhere. The Saitek Kasparov Portable Talking Coach Chessboard has a peg sensory board and audio feedback. It has 384 level settings for you to choose from. This chess computer has normal, aggressive, and other modes of play.
The above GIF shows this chess computer against Hiarcs. This is a rare item but you can still find it on eBay if you look hard enough.