Anyone who owns a smartphone knows that it can be very helpful in many a situation. Whether as a navigation device, shopping list or simply for entertainment purposes - the application possibilities are almost limitless. The revolutionary Quad Lock mounting system now makes the use of the smartphone even more practical and versatile. The main component of the Quad Lock is the case, which is attached to the smartphone. This serves on the one hand as a stable protective cover and on the other hand as a counterpart for the various holders. The cutouts for the connector and camera are present as usual. The case is made of sturdy polycarbonate plastic and thus offers optimal protection. The passive part of the mounting device for the various holders is located on the back.