The “ALP204” often has sub-variants: ALP204L (Label), ALP204R (Receipt), or ALP204M (Magnetic stripe). Check the sticker on the underside of the printer. The driver package is usually universal, but firmware differs.
: If the printer shows as "Offline," try plugging it into a different USB port on the back of the PC. avasys alp204 driver download windows 10 install