The form-stable HaloX® system is modularly designed for use in cast-in-place concrete. Three housing diameters with a variety of round, square, and universal front parts allow for the integration of lights and speakers with a mounting diameter of up to 250 mm - even in exposed concrete. The system provides ample space for accommodating operating devices, such as LED drivers, with tunnels. Optional extension rings can be used to increase the installation depth. All front parts are moisture-resistant and can be precisely positioned and nailed down before the first reinforcement is laid. The housing and front parts are securely and stably interlocked and can still be freely adjusted afterward. The tool-free opening mechanism with a combination entry M20/M25 allows pipes to be easily and quickly inserted, and even in case of incorrect placement, the entry can be easily resealed. It offers secure pipe retention with a depth stop, eliminating the need for subsequent internal shortening of the pipes. After pouring, front parts with a defined mounting diameter can be opened with a targeted hammer strike. The front parts for universal opening sizes can be flush-mounted or overlaid with plaster. Subsequently, the desired installation opening can be created using conventional milling tools, such as the MULTI 4000.