Your RADIO SHACK 1650 is an uncomplicated chess computer that automatically registers your moves on the build-in chessboard. It uses 16 lights on the edge of the board to indicate its own moves. This computer is battery and AC adapter operated and contains a low-power memory which will retain the last operation of an interrupted game for up to one year.
Excerpts taken from the “Radio Shack 1650 Fast Response” User Manual
Custom manufactured in Hong Kong by SciSys for Radio Shack a division of Tandy Corporation, Fort Worth, TX 76102