Spec Sheet Preview: The Alpha Communications® / S.T.R.™ HT40 QwikBUS™ Series handsets are designed to work as an apartment type handset intercom station, using a minimal of wiring. All HT40 handsets in a building can be wired on only two (2) common (loop) wires! Choose from White or Anthracite (Charcoal) colors. These attractive handsets easily surface mount right on the wall or over a single gang flush electrical back box (or plaster ring). Handsets can be changed to desk mount with the addition of a model TZ1003 series desk …