This is the official Grundig AC Adapter power cable for all Grundig micro-cassette desktop units. This includes the Grundig 3110, 3110D, 3110T and 3110C. This is a very hard ac adapter to find since its manufacturered in Germany. Supplies are limited. You must use the manufacturers power supply so you will not damage you transcriber or dictation machine. If you have questions feel free to contact us.