You can download the latest drivers for Windows, macOS, and Linux directly from the ZJIANG Service Page
For most POS9210L users: Use the built-in Windows Generic/Text Only driver. If you need advanced features (opening cash drawer, cutting paper, printing images):
The download took twelve minutes. During that time, a customer asked for a first edition of The Hobbit (she found it), the phone rang twice (wrong numbers), and the printer beeped three times—angry, impatient beeps.
Locate the sticker on the bottom or back of the printer. It should say “Model: POS9210L” and show voltage (usually 12V/2A or 24V).