Panasonic Shockwave SVSW30s is a water-resistant digital music player and FM radio designed to deliver outstanding audio entertainment in tough, outdoor conditions. This WMA/MP3 player is rugged enough to withstand shock and vibration, yet easy to use. Compatible music files mp3, Wma. Memory capacity 256mb. Will not skip. Easy-to-read 4-line LCD display. Power source: 1-AAA alkaline battery, not included. Mini headphone jack. Playback time up to 9 hours. Shockwave® tough body design. Water resistant. Built-in digital synthesizer FM tuner. Memory presets 20 stations. Drag-and-drop file transfer. 6-preset eq mode. ID3 tagging. Playlist selection. A-B repeat. Dimensions (H x W x D) 2 1/8 x 3 3/16 x 7/8 inches. Shipping Weight: 3 lb