Aving.net have provided more pics of the ultra slim mobiBLU US2 device seen below. Looking at the shot below and others on the link below you can in fact see that it is really is ultra slim.
* 1gb, 2gb, and 4gb Capacities
* 1.5-inch OLED color display
* Audio, Video, Photo support
* FM Tuner and Recording
* SRS WOW Audio Processing
* Necklace design
Via: DAPReview