Up for bid is a Personal Jukebox PJB100 produced by HanGo Electronics. From Wikipedia: The PJB was created as a personal audio appliance prototype by and Palo Alto Advanced Development group (PAAD). The project started in May 1998, a month before the merger into Compaq was completed, and a final product was brought to market in November 1999. The PJB was the first hard-disk-based MP3 player made available on the market. The "100" in the "PJB-100" name was chosen from the capacity of the original 4.86 GB hard drive in the first Personal Jukebox. With this drive, the unit was expected to hold about 100 popular (45 minute) music CDs encoded at 128 kbit/s. The name was kept for the later models with bigger hard drives, even though these could store a larger number of albums. The PJB-100 was the first MP3 portable to garner a "Milestone" product designation from , which they defined in their January 2000 review of the PJB-100 as "any product whose breakthrough innovations are so significant, they influence the future course of its industry". I can confirm that this is still working but am not positive how long the Lithim Ion battery lasts for. It does appear to hold a charge for some time though. Great "vintage" item for any collector and can certainly still be used as an MP3 player if you would like.