MPC4 Neoprene MP3 Player Shuttle (Discontinued by Manufacturer) MP3 player case with adjustable arm band holds most compact MP3 players Removable arm band for unrestricted use of player during activities Weather-resistant neoprene material, cushions and protects delicate electronics Headphone line out Dimensions: 3 x 3 x 1 inch (WxHxD); 25-year warranty