Memotech Memopak 16K

Brand: Memotech Limited / Memotech Corp.
Model: Memopak
Country of origin: United Kingdom
First year of production: 1982

A 16 Kb memory expansion interface for the ZX81 (or ZX80 after a modification to its motherboard). Memotech also produced a 32 Kb and even a 64 Kb version.