CAT 5 USB extender - for the 600 series For installations that require the use of fire-resistant, plenum-rated cables, the CAT 5 USB extender increases the distance between the SMART Board interactive whiteboard and the USB connection by up to 120' (37 m). Model - CAT5-XT NOTE:Suitable for SMART Board 600 series interactive whiteboards and SMART Board 600i interactive whiteboard systems