... building intercom system >strong explosion,dust,water-proof >IR CCD camera >with CE & FCC & RoHS Door Station for Direct-call SystemModel ... Specification:1>Outdoor station for 3 apartments 2>IR CCD camera for clear and sharp view.3>Call & two way ... indoor phones, factory or apartmentIndoor monitor:OP-D7A5MCall,intercom with the outdoor station and administrator center,monitor outside,door release ...