The Brother AD9100ESA (D00WTG001) is an AC adapter spare part for powering compatible P-touch label printers. It provides the external power connection these printers use during label-making work.
The adapter is specified for 24 V AC. A distributor listing for D00WTG001 also gives a rating of 2.65 A and identifies it as PT-AD9100ES. Listed compatible models include PT-9500PC, PT-9600, PT-9700PC, PT-9800PCN, PT-P900W and PT-P950NW. A specialist retailer also lists PT3600, PT9200PC and PT9400.