Aiphone DBS-1A Silver Door Phone Kit with Open Voice Master Station

FEATURES Door release powered by door station without the need of an additional transformer Backlit directory All Call between stations within same tenant residence or office Option button to control an external device Call tone volume control with mute indicator Convenient box set is complete with a tenant master station, a 1-call entrance station, and a power supply (up to 3 more tenant master stations and 15 tenant sub stations can be added for a full 1 x 4 x 16 system) Optional call extension speaker   SPECSCommunication: Hands-free (VOX) or push-to-talk (simplex)Door Release: 9.5~20V AC, 70Ω or higher resistance - use EL-12SWire Type:Entrance Station to Tenant Master Station: 2-cond., low cap, PE insulation, solid, non-shielded - use Aiphone #871802Tenant Master Station to Tenant Sub Station: 4-cond., low cap, PE insulation, solid, non-shielded - use Aiphone #871804Between Tenant Sub Stations: 4-cond. + 2-cond. when sharing power - use Aiphone #822206 or #871804Power Supply to T