Touch-A-Matic
Vinyl overlay for Sinclair keyboard with punched holes to aid in data entry.
Timex/Sinclair 1000
ZX Chess II
All the features of ZX Chess I, plus more. Has a book of 32 opening moves. Can play at 7 levels, four of which play within competition time limits. A move is suggested by the computer if requested. 16K.
24 Line I/O Port
Controlled using BASIC, with suitable interface circuits will control LEDs, motors, relays, lights, sound generators.