... door cameras connection.(5).Audio + video conversation with visitor.(6).Door open:(front door & common gate) function.(7).Call ... 5).Mount:surface mount by 86 case.(6).Cable:RJ45 port and CAT5 cable.(7).Communication Protocol:RS485.4.Packing Information ... TimeSets/MonthMaterial100sets20days10,000Plastic+Al alloy 6.Accessory:fixed board,screw,manual,patch cord,network cable.7.Certificate: CE/RoHs.