The iHP-100/H100 players natively play MP3, Ogg Vorbis, WAV and WMA (non-DRM) format files.

The H100 series is equipped with a 1.8 inch (45 mm) form factor hard drive manufactured by Toshiba.

Storage density has increased since their introduction, making it possible for users to replace the factory drives with higher capacity aftermarket models.

It is possible to replace the factory battery with a higher capacity one (up to 2200 mA·h has been reported) for greatly increased playback time.

Users have succeeded in adding an RTC chip to the player's main circuit board, allowing the device to display the current date and time as well as adding alarm clock functionality, accurate filesystem timestamping and last.fm logging.