The Brother LN7658001 external AC adapter, listed as model AD9000, is intended to power the PT-9600 label printer. Its 24 V, 2.5 A output identifies the electrical supply for this specific printer setup.
The black adapter is a separate unit from the printer and is specified for indoor use. Its part number, LN7658001, identifies this model in Brother’s range, while its stated purpose ties it specifically to the PT-9600.
For an indoor label-printing work area, this adapter provides the listed power output for the PT-9600. It is intended for that printer rather than described as a general-purpose supply.