'Single-family kit for Simplebus 2. Suitable for installation in residential, commercial or office buildings. The kit is supplied pre-programmed and ready to use. The kit consists of 1 flush-mounted Ultra entrance panel art. UT2020/4 with call button art. UT9211M, no.? 1 Hands-free Mini series door entry monitor art. 6721W and all the accessories required to create the system.