The handset of the U102B wireless doorphone is intended for the extension of the COMWEI wireless doorphone system. Apart from connecting with the doorphone, the handset can also function as a cordless telephone after connecting the base to the telephone network. The COMWEI wireless doorphone system allows to receive phone calls and calls from the doorphone in parallel.
If more than one handset is used in the system, it is enough to connect only the main base to the telephone network, so that all the handsets will gain the functionality of the phone.