Spec Sheet Preview: The paging adapter(s) shall be Alpha Communications® / S.T.R.™ model DV4, or approved equal. Amplifier shall operate from a 16VAC (40VA) U.L. Listed transformer (model T1640). All wiring to adapter shall be low-voltage Class II wiring, installed as per all federal, state, and local electrical codes. Paging adapter shall surface mount right to the finished wall and shall be installed in a suitable environment that is free from excessive dirt, dust, temperature, humidity, grease and water. For most secure …