SKU: DB-1SD
- All Call between stations in same residence / office
- Option button for external device control (N/O dry contact, AC/DC 24V 1.6A Max)
- Call tone volume control with LED mute indicator
- Receive volume control
- Optional Call Extension Speaker (IER-2)
- Optional external signaling to 3rd party bell or light using RY-ES (used in lieu of IER-2)
- Door release button (powered by door station)