TEAC MP3 Player 4GB. Player media type: Flash, Total storage capacity: 4 GB. Display: LCD, Display diagonal: 38.1 mm (1.5 "). Continuous audio playback time: 10 h, Battery technology: Lithium-Ion (Li-Ion). Weight: 40 g. Dimensions (WxDxH): 70 x 40 x 10 mm, Media types supported: MP3, MP4, WMA, JPG, Audio recording formats: WAV