The following review is based on a 4GB SanDisk Cruzer Micro flashdrive. This portable device features a black molded plastic outer housing with an opaque (slightly transparent) inner housing. The inner housing and USB prong is retractable, eliminating the need for a cap. The activity LED on this model is located in the opaque inner housing and is exposed once the USB prong is extracted. Despite the use of two different housings, the SanDisk Cruzer Micro feels extremely light.