The Alphatone™ chime tone unit(s) shall be Alpha®/S.T.R.™ R2006 or R2007 or approved equal.

The R2006 shall be used with the HT2006 series handsets when one (1) or more door stations need to send an audible signal to any of the inside handsets.

The R2007 shall be used an any HT2000 and/or HT3000 series handsets, when the electric buzzer needs to be replaced with a more pleasing sounding chime/tone unit,or as a stand-alone tone unit.

Contractor shall observe all local and national electrical and building codes.