The EUROLITE BP-4 is a passive mounting plate designed for the MR-1 system. It provides four XLR connectors in D-Type format for integrating compatible lighting signal connections into the MR-1 setup. The product is identified as a lighting control accessory and does not include any stated power supply, signal conversion, splitting, merging, networking, wireless, or testing functions. Its listed net weight is 0.12 kg.