We are the manufacture of the HDD player. Features of the mpeg-4 HDD player This product is a multi-functional av HDD player, with the features of volume delicate and easy to use. Its a good helper for your study, work, entertainment and a good companion for your life. 1. Portable HDD function: USB 2.0 interface, windows management, be convenient for your study, work and entertainment. 2. Playback function: Can play av programs as mpeg4, DVD, VCD, MP3, CD, etc. And jpg pictures. 3. Edit function: Can do the operations as copy, remove, rename, delete, and so on, for the files and folders in the HDD. 4. Large capacity: Can adopt the HDD of 20g,40g or 80g. For example: The 40g HDD can save 20,000 MP3 songs or 70 mp4 movies. 5. Search playback, repeat playback, a-b segment repeat playback, etc. 6.9-picture playback function for the picture,12 kinds of pictures playback transition effect. 7. Cvbs/avand VGA video output, can be connected to the TV or computer display. 8. TV signal: Pal, NTSC, auto. 9. Full function remote control, more convenient. 10. Stereo audio output. 11. Portable design: Volume only:132 x 80 x 19 mm, weight:215g. Specifications of the mpeg-4 HDD player Power: DC 5v Power consumption: <=800ma Signal system: Auto/NTSC/pal Product dimension:132 x 80 x 19 mm Weight:215g Playable programs: Mpeg4, DVD, svcd, VCD, jpeg, MP3, cd-da Video output:1vp-p +/- 0.1(75ohm) Audio output:2.0 vrms +/- 0.3v Features of the audio signal output: Frequency response:20hz-22khz S/n: More than 90db(1khz 0db) Dynamic range: More than 80db(1khz 0db) Audio distortion: Lower than the test level Crosstalk: More than 80db(1khz 0db) HDD:2.5 inch,20g/40g/80g Remote control system: Infrared impulse, DC 3v, button battery Quantity: 1-5000