The mini receiver RCL04 is primarily used to expand existing systems. With its two potential-free relay contacts, various systems can be enhanced with a radio interface. Retrofitting a garage door opener is just as easy as integrating Easywave transmitters into complex intercom systems. The RCL04 operates on 12-24 ACDC and can learn up to 32 transmission codes. Technically, the RCL04 is identical to the RCL03, with the only difference being that the housing offers increased protection against dust and water with an IP65 rating.