The blind coupling is one of many components in the DUOline rail system. The 2-phase system is extremely flexible and offers many possibilities for individual lighting design. In total, a system length of up to 30 meters per input is possible. With the help of a blind connection, two separate circuits can be optically connected to form a system. A good example of the system being characterized by maximum flexibility and efficiency. The system is available in three different color variants, here m-white.