You need both, but prioritise firmware first.
Here’s a clean and professional text for a “Lzn Projector Update” announcement or instruction: Lzn Projector Update
Visit the official support page, or utilize a Driver Identifier Tool if direct downloads are unavailable, to find the latest firmware for your specific LZN model. You need both, but prioritise firmware first
If you want, I can:
LZN Projector driver - DriverDouble.com