- Vandal resistan, 14-gauge stainless steel faceplate- Heavy-duty metal push button and mounting gasket- Flush mount using the included rough-in box or surface mount using an optional VE-5x5 backbox- Yellow call progress/night light LED- New high output speaker amplifier with volume adjustment POT- Microphone volume adjustment POT- 24V talk battery- 20 Hz ring generator (3.0 REN ring load maxiumum)- Selectable ring cadence (standard or 2 short rings)- Selectable number of rings (2, 3, 10, or 30)- Selectable