For a speedy processing of your order, please ensure you enter your phone number at checkout. Internal master for a simple Two-Wire Door Entry Kit. DA-1AS - Provides Entry Security for your Residence | Simplified Two-Wire Door Entry Kit | Aiphone's DA series residential audio intercom provides audio comminication froma door station to an internal handset station. The DA Series features simple two wire cabling, AC operation by inexpensive plug pack and AC door release operation. The DA series is available either in boxed sets containing a single door station and room station or as individual components for 2 or 4 call door station and individual handsets. FEATURES: | Also available are two button and 4 button door stations suitable for small apartment blocks. In addition the DA Series features an optional second door release function and door stations available in grey and silver. Connect Electric Door Release with same 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). Master station is 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. Calling: Electronic tone (while the button is depressed). Communication: Simultaneous with handset. Weight DA-1MD: approximately 370 g. DA-1DS: approximately 270 g. Wiring: 2 wires, polarised from door to DA-1MD. Distance From door to master station (Wire Diameter: 0.6 mm / 0.8 mm / 1.0 mm): 110 m / 200 m / 310 m Master station to Power supply (Wire Diameter: 0.6 mm / 0.8 mm / 1.0 mm): 55 m / 100 m / 155 m Weight: 0.412