Aiphone IE-8MD Selective Call Main Handset for 2 Doors, Up To 6 Rooms

FEATURES Selective Call or All Call between handsets Simple 4 conductor wiring between handsets Two doors with selective door release External doorbell can be added AC or DC powered (12~16V AC or 12~18V DC)   SPECSCommunication: Handset (full-duplex)Door Release: N/O dry contact, 24V AC/ DC, 350mAWire TypeDoor Station to Master Station: 2-cond., overall shield - use Aiphone #822202Master Station to Sub Stations: 4-cond., overall shield - use Aiphone #822206DistanceDoor Station to Master Station: 500'(22AWG) 1,180'(18AWG)Master Station to farthest Sub Master Station: 245'(22AWG) 580'(18AWG)