The FX-I355 HDMI 4K ULS fibre extender cable integrates a hybrid construction, combining optical fibre for AV signal transmission and copper for power and data pathways. This design supports stable, high-bandwidth HDMI connectivity across extended distances, while the LSZH (Low Smoke Zero Halogen) jacket minimises smoke and toxic emissions in critical environments. Suitable for meeting rooms, control rooms, and digital signage, the FX-I355 supports plug-and-play operation, including CEC, EDID, and HDCP protocols. Supports resolutions up to 4K UltraHD at 60Hz, maintaining full bandwidth for high-definition video and audio. The small cable diameter of only 4.5mm allows an extremely tight bend radius up to 45mm (static) or 90mm (dynamic), especially for installation in tight environments, such as the back of a rack. They are unidirectional, i.e. directionally bound and should not be connected the wrong way round the ends are distinctly marked.