TTSD2 Smart Screen - Twin PackSmart Screen is a real working animated screen in miniature which you can customise with your own messages to really bring your layout to life! The small display module has everything built inside so you only need to connect 2 wires to DC or DCC power to make it come alive. The Smart Screen can display multiple screens which can be triggered by a range of different inputs including switches, DCC commands and even Track Sensors which can be used to