IM-S150 obtained a award at the iF Design Award 2007. It features a 1.3Mpix camera, a dictionary, an MP3 player and wireless Internet. Measuring 3.7×7.8cm and weighing 80g.
While the IM-U150, it has a simple and refined design. It comes with a touch wheel with a purple LED that lights up depending on the movement of your finger, 1GB of internal memory, a 3D engine for the sound, and an improved MP3 player.