GeezerVison

slotMusic was a brand of microSD^[1] memory card developed by SanDisk preloaded with music in MP3 format.^[1][2] They were first available at Wal-Mart and Best Buy stores in October 2008.^[3] The selection of songs came from Universal Music Group, Sony BMG, Warner Music Group and EMI Music.^[1][2] As of mid-2011, SanDisk's website listed a total of 14 albums available in the SlotMusic format.

The audio files contain no digital rights management,^[2] and are encoded at minimum bitrates of 256 to 320 kbit/s.^[2]

slotMusic albums may also include high-quality images and videos in multiple formats.^[2] The contents of each microSD card may be altered by the user, enabling them to add or remove files from the slotMusic card as desired.^[2] Another type of card, slotRadio, was developed in 2009 which had radio-like controls. A slotRadio card had more restrictions on how it worked, such as not being able to backtrack to a previous song.