Lambda 8300 was a Sinclair ZX81

Sinclair ZX81

The ZX81 was a home computer produced by Sinclair Research and manufactured in Scotland by Timex Corporation. It was launched in the United Kingdom in March 1981 as the successor to Sinclair's ZX80 and was designed to be a low-cost introduction to home computing for the general public...

 clone from Lambda Electronics Limited. It wasn't a straight clone as the original ROM is a new one but it could be fitted with a ZX81 ROM and become compatible. Comes with 2K RAM (expandable to 16 or 32 K), sound and joystick port. Runs with a Z80A at 3.25 MHz. Identical with PC 8300

PC 8300

PC 8300 was a Sinclair ZX81 clone from China with rubber keys, joystick port and monitor port. Identical with Lambda 8300 and Power 3000....

, Power 3000

Power 3000

Power 3000 was a Sinclair ZX81 clone from Creon Enterprises. Identical with Lambda 8300 and PC 8300....

 and Basic 2000.