This rugged, rubberized, waterproof case works with virtually any MP3 player or cell phone. Its protective performance is a great choice when taking your electronics to the beach or working out. It connects via the headset jack on the inside of the case. Detachable carabiner offers a variety of attachment options. Runs on AA batteries (not included). Dimensions: 2.5"L x 4.5"W x 7.3"H. Colors: Black, Blue, Yellow.