Its advantage is also its drawback, namely that it can store accessories such as lanyards, but also takes up more space. For the case of Becker 50 who takes place here, it is not possible to correctly insert the GPS to the bottom of the hull otherwise spend many minutes trying to highlight the (then there more room to insert fingers between the shell and the device) without shaking the box until it falls !! A shell at an acceptable price, but so advise primarily for GPS sizes below ...