The iRiver M31 Shining And M41 Revolve MP3 Players are the latest from the company. Both devices measures 80.5mm x 26mm x 11mm and weighing at around 22grams, the iRivier M31 is the entry-level player in the group offering the option to be used as a USB storage device. It gets a tiny OLED screen which measures 128 x 32 and supports popular media formats such as MP3, WAV, and WMA.
The M41 Revolve on the other hand gets a bigger 1.8-inch display with support for both audio and video playback. It measures 8mm x 8mm x 40.4mm and is a bit heavier than the M31, weighing at 45grams. The iRiver M41 offers support for MP3, WMA and AVI Video Files.