... Not entirely thought through. A unit number keypad 0-9 with 10-key would be helpful. Because then you needed any additional remotes. Programming requires a lot of practice; this would certainly manageable with a Unit Nos keyboard slightly. For the elderly a magnifying lamp is recommended for programming, because the display is very dark. Moreover, the Unit Nos. kept very very small in the upper display area, which can therefore also be omitted. - My summary; Essentially an indispensable part of automation, which should better have the size of a standard TV remote control with larger keys and more readable display.