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The NDR-30A is a 30 call master from Aiphone which features selective outputs and a handset for high quality and reliable operation. The NDR-30A master comes with a lamp memory call-in function, additional contact capability, a selective door release, as well as NEM compatibility, and a push-to-talk button. The NDR-30A master also features a 500mW max communication output, a 420’ wiring distance, and an extremely user friendly design. This master station is capable of being effortlessly installed, and offers high quality and reliable operation for any area it is used within.