Features: slim compact design. Programmable track memory. 1-Bit d/a converter. Digital lcd display. Skip, search, play/pause, random, repeat (repeat 1, repeat all). Dbbs-digital bass boost sound system. Key hold function. Automatic power off. Dc 4.5V ac/dc adapter jack. Requires 2 x aa batteries (not included). 3.5Mm headphone jack. Blister packaging. Specifications: unit dimensions: 5.5 X 1 x 5.25 (Whd). Accessories included: professional stereo headphones.