THEBEN TU 4 S KNX-RF push button interface | 4-way

![CDATA[Radio button interface 4-way TU 4 S RF KNX Bus system KNX, Bus system KNX radio, Other bus systems without, Installation type flush-mounted, With bus coupling, Control LED, Number of inputs 4, Input voltage 0 ... 3.3V, Type of input voltage AC/DC, External query voltage required, Protection class (IP) other, Min. depth of the device box 25mm,]]>