The m7 uses the vs1000 chip from VLSI.
The m7 has all the same functions as the S100 plus some extra features like bookmarking and earphone spatial processing. It uses Ogg Vorbis as the file format and can produce much higher quality sound (approaching CD quality audio). The storage medium is microSD or microSDHC, so vast quantities of audio can be accessed using this player (potentially thousands of hours of audio). The use of Ogg Vorbis also makes it suitable for high quality reproduction of music.
The m7 has an internal rechargeable lithium (LiPo) battery which is recharged via a mini USB port at the top of the device.
The m7 is very compact, being about the size of a credit card, but 13 mm thick. It has a built-in speaker as well as a standard 3.5 mm stereo earphone socket. It also includes a button lock at the top so that you can avoid losing your place from accidental button presses while it is playing or prevent it from being switched on accidentally while it is in your pocket or bag.
The button functions are as follows:
- Next Book/Next Bookmark
- Previous Book/Previous Bookmark
- Next Chapter/Scroll Forward
- Previous Chapter/Scroll Backward
- Category Selection/Save Bookmark
- Volume+/Repeat Chapter/Earphone spatial processing
- Volume-/Repeat Chapter/Earphone spatial processing