My Bandai 8BAN miniature record player .I bought it in 2004 on a whim and am so glad I did.
here is more info about it from the fab Museum of Obsolete Media
“8ban records are so called because they are 8 cm in diameter (just over three inches). They were introduced for the Japanese market by Bandai in 2004 along with a special battery-powered player and eighty titles were available at launch, including Japanese pop and some Western oldies.
Bandai produced the player for around a year, and in 2005 the band The White Stripes bought up the remaining stock of 400 players to sell as merchandise on their tours, along with 8ban versions of eight of their singles. They called the format Triple Inchophone, referring the 3-inch size, and these records now command a high price.
8ban records are single-sided and can hold up to 4 minutes of music played at 33⅓ rpm. Some records have a small centre hole, while others have a larger hole like a US 45 rpm single, so the 8ban player came with a small adaptor for these. Although the Bandai 8ban player only had one speaker, the records were usually stereophonic. Due to their small size, most standard record players cannot play them.
In 2019 a new 8ban record player was released, the Crosley RSD3, along with 20 new titles for Record Store Day.
As of April 2019, there have been 116 titles produced on 8ban records.” (Text Source -obsoletemedia.org )