The remote receiver can be used as a replacement for the R921, R922, R1221 and R1222 receivers.  It can also be used as an optional fourth remote receiver for the R922.

The remote receiver includes one 24" extension, however, various lengths of receiver extensions can be purchased allowing various placement options for mounting purposes.  Additional remote receiver extensions are available in 6", 9", 12", 24" and 36" lengths.