Aiphone DA Series 1 Door / 1 Master Kit, Inc. DA-1DS, DA-1MD, 16VAC1500/5

Set containing: AI-DA-1DS, AI-DA-1MD & power supply: AI-DA-1DS is a silver door station that connects via two wires to a master AI-DA-1MD. The AI-DA-1DS features a 12V AC output for door strike connection, call button and illuminated directory. The master handset DA-1MD features a call tone volume control, handset for communication and button for door release.