Panasonic SV-SW20S SHOCKWAVE® Digital Audio Player with 128MB of Built-in Memory, Silver FEATURES: Compatible Music Files : MP3 1 : WMA 2 Memory Capacity : 128MB 3 Will Not Skip : No Moving Parts LCD Display : Easy-to-read 4-line Display Power Source : 1-AAA Alkaline Battery (not included) Headphone Jack : Yes Playback Time 4 : Up to 9 Hours (on 1 AAA Battery) SHOCKWAVE® Tough Body Design : Yes Water Resistant 5 : Yes Built-in Digital Synthesizer FM Tuner : Yes Built-in Microphone : No Memory Presets : 20 Stations Drag-and-Drop File Transfer : Yes 6-Preset EQ Mode : Yes ID3 Tagging : Yes Playlist Selection : Yes A-B Repeat : Yes Color : Silver Included Accessories : USB Cable : Arm Band : Headphones Dimensions (H x W x D) : 21/8'' x 33/16'' x 07/8'' Shipping Weight: 3 lb