Braille chess Brail / Braille chess

dded panel and sensor in the board control, using the principle of photoelectric sensors, when chess pieces are put on the chess pit, sensors in the chessboard can sense the position ,on which chess pit the pawn has settled down. When the two sides start the game, voice prompts each other to go pawn, and to fall into the position of the board. With the volume changed , when the environment is noisy, put on headphones, without interference of outside, that's only the hands moving but not mouth.