Marquant MMP4-21. Player media type: flash-media, Total storage capacity: 4 GB, Compatible memory cards: microSD (TransFlash). Display: LCD, Display diagonal: 127 mm (5 "), Display resolution: 480 x 272 pixels. Audio formats supported: AAC, AC3, AMR, MP3, OGG, WAV, WMA, Video formats supported: ASF, AVI, H.264, MKV, VOB, WMV, XVID, Image formats supported: BMP, GIF, JPG, PNG. Headphone connectivity: 3.5 mm. Frequency response: 30 - 20000 Hz, Impedance: 32 Ом