2-Wire 8 family intercom kit with Ultra audio/video entrance panel and 8 Hands-free People door entry monitor. Supports 8 apartments. Expandable to larger multi-unit installations. The kit includes: 1 x art. UT1090S Ultra audio/video module, 8 x art. PL6721 Hands-free people monitors, 1 x art. 4888CU Simplebus 2, 1 x art. 1595 100-240VAC / 33VDC Power supply unit.