SanDisk has produced a number of flash memory-based portable media players from 2005. SanDisk players were marketed under the Sansa name until 2014, then SanDisk Clip. Model history. Sansa e100. The Sansa e100 series has a monochrome display with a blue backlight, FM tuner with 20 presets, SRS WOW technology, an SD card slot supporting cards up to 2 GB, an internal memory of 512 MB (e130) or 1 GB (e140), and a single AAA battery for power. It supports MP3, WMA and Audible file formats. The e140 was also known as the SDMX2.
https://en.wikipedia.org/wiki/SanDisk_portable_media_players