HANDSFREE INTERCOM SUB STATION SPARE SLAVE - AIPHONE The DB-1SD is the sub master station for the DB SERIES The Aiphone DB series intercom is designed for small apartment blocks or single residences. Up to five hands free stations can be installed in each residence. The Aiphone DB system requires a 15 volt AC power supply and is designed for use with AC operated strikes. An Aiphone IER2 call extension unit is also available which will ring when a call is made from the door station Simplified Two-Wire Door Entry Kit when the DA-1DS door station is added ( DBS-1A kit ) Aiphone's DB series residential audio intercom providesaudio comminication from a door station to up to 5 internal handsfree stations. The DB Series features simple two wire cabling, AC operation by inexpensive plug pack and AC door release operation. The DB series is available either in boxed sets containing a single door station and room station or as individual components for 2or 4 call door station and individual handsets. NOTE: When expanded to 5 internal units system requires 3x power supplies FEATURES: Also available are two button and 4 button door stations suitable for small apartment blocks. In addition the DB Series features an option button that can be used for either a second door release function or to trigger an entrance light etc. Single call door stations available in silver only whereas 2 and 4 call door stations available in grey and silver. Connect up to 4 additional sub stations. Chime tone calling. All call between internal stations. Connect Electric Door Release with two wires from door station. Requires no extra power supply for door release. An AC operated door strike is required. Existing doorbell or chime wires can be utilised (disconnect from transformer). Internal stations are equipped with Door Release and one function button to turn on entrance light, etc. Optional call extension sounder. SPECIFICATIONS: Power Source: AC 15V, supplied from Power Supply Power Supply: Requires 15 V