All items from the HX system are compatible with each other and can be freely supplemented and expanded. The HX Curve wireless receiver features an integrated Schuko socket with child safety, ensuring you don't lose any space at your outlet. This also makes installation easier, as you only need to plug your chime into the socket. The HX system has an easy-to-use self-learning function for adding additional components. To increase the range, one or more range extenders can be interposed. Additional transmitters such as the HX wireless motion detector or the HX wireless passage detector can also be integrated into the system. To avoid overlaps, the HX system offers 256 frequencies that the device learns automatically. Installation: The chime only requires one outlet due to the plug-in connection. Volume control: The volume of the chime can be adjusted in 4 different levels, with the highest level reaching 90 dB (A). The receiver can play 8 different melodies. Mute function: The chime can be easily and quickly muted using the on/off switch. Call distinction: When using additional transmitters, a different melody can be assigned to each transmitter (e.g., front door/back door).