[. . . ] [. . . ] The antenna module includes the transceiver 868, 3MHZ. SPECIFICATIONS ELECTRICAL Operating Voltage : Powered by the connected controller RF Commnication RF band Receiver class : 868, 3 MHz Transceiver :2 environment RF communication Technology : short, high rate transmission to minimize air time and avoid collisions FEATURES · Bi-directional communication · Length of the antenna cable can be max. 30m · Up to 3 underfloor heating controllers can be connected to one antenna RF communication range : 30m in a residential building ENVIRONMENTAL and STANDARDS Storage temperature Operating temperature Dimensions (HxWxD) Humidity IP class Compatible products Approval : -20 . . . Printed in Germany EN0H-0445 GE51 R0303 Manufacturing location certified to [. . . ] [. . . ]