Before connecting the printer, you must extract the driver files.

Some driver update utilities, such as Driver Booster, list the Letatwin LM-390A driver in their databases. Programs like Driver Booster 13.1.0.171 have been mentioned in connection with Letatwin drivers. These tools can automatically detect your device and install the appropriate driver. However, these are third-party tools, and it is recommended to read user reviews before installation.

The official source for these files is the portal managed by MAX Co., Ltd.