Lambda 8300
The Lambda 8300 was a Sinclair ZX81 clone from Lambda Electronics Limited of Hong Kong. It was not an exact clone, as it had a modified ZX81 ROM, but could be fitted with a ZX81 compatible ROM. It came with 2K RAM (expandable to 16K or 32K), and a sound and joystick port. Specifically, it used a Z80A microprocessor at 3.25 MHz.
Unisonic distributed it as the Futura 8300 in the US. The computer was somewhat successful in Northern Europe (mostly in Denmark and Norway) and China, and today enthusiasts still develop new hardware.

Models

Lambda 8300 (Hong Kong, United Kingdom, Sweden, Norway, Denmark)
Your Computer PC 8300 (China, United States)
DEF 3000 (France)
Basic 2000 (Norway, Sweden, Finland)
Marathon 32K (Norway, Denmark)
Tonel PC (Hong Kong)
Unisonic Futura 8300 (the United States of America)
PC-81 Personal Computer (China)
CAC-3 (China)
Polybrain P118 (New Zealand)

Other Models
Creon Electronics Power 3000 (Hong Kong, Germany, Denmark, Canada)
NF300 jiaoXueDianNao (China)

Unknown Models
Basic 3000
PC 2000

References

External links
 Old-computers.com
 Sinclairzxworld.com

Sinclair computers and derivatives
Z80-based home computers