Like the Spectrum Plus, the CZ-Spectrum replaced the CZ-2000. It also was Sinclair Spectrum fully compatible but featured several enhancements:
• A Reset button,
• Two Sinclair compatible joystick connectors
• A video composite output in addition to the TV/RF modulator.
The machine seems to be built under Sinclair licence as it used same Ferranti ULA chip than genuine Sinclair Spectrum.