The R2006 units work only with the HT2006 series handsets, and are used when there is one (1) or more door entry stations that need to send an audible tone signal to any of the inside HT2006 handset stations.

The R2006 Alphatone™ units simply plug onto the pin assembly, found inside the HT2006 handset on the PC board. The actual tone mechanism is provided with a selfstick tape to allow it to be mounted inside the handset casing.