The Sony Slim-Man is a four track cassette player and two track cassette player/recorder designed for use by individuals who are blind or have low vision. It plays cassette tapes at 1 7/8 (standard) and 15/16 (Library of Congress Talking Book) speeds. It features a stereo microphone, variable speed control, pause, a tape counter, and microphone and headphone jacks. Print and cassette instructions are included. POWER: Uses four triple-A batteries (included) or alternating current (AC) adapter (included). DIMENSIONS (HxLxW): 2 x 9.25 x 5.5 inches. WEIGHT: 1.13 pounds.