Spec Sheet Preview: The Alpha Communications® / S.T.R.™ TTE33-3 QwikBUS™ Panel Speaker/Microphone units are used with the AlphaEntry™ / QwikBUS™ type systems to provide intercom functions at remote door entry locations , and depending on system configuration, optional electric door opener(s) etc. The TTE33-3 powers from the associated model# SP333 QwikBUS™ Intelligent Controller unit(s), and does not require any additional power supply unit(s). The TTE33-3 speaker/microphones are designed to easily mount right behind the …