4GB ?Size: 90 x 38.7 x 8mm ?Output Frequency: 20Hz - 20kHz ?Signal / Noise Ratio: > 90dB ?Channel Separation: > 40dB ?Frequency response: 20Hz to 20Khz ?Audio Connector: 3.5 mm headphone jack ?Color: Black, Silver, Blue, Pink, Features: ?1.8" High Resolution ReaL Color LCD Screen. ?Support multiple music formats: MP3, MP4, WMA, WMV, ASF, WAV, DMA. ?Support WMV, MPG, MPEG I , MEG II, and AVI Convert To AMV. ?Convert JPEG, GIF, SWF Picture Files or else to PIC Files to be viewed by AMV.