These longer 4-pin spacer cables require Data Boosters (Sender-Receivers) to function properly.  Cable runs of over 20-FT will lose the data signal from the controller or previous pixel.  Extender Cables paired with Data Boosters on each end, maintain the integrity of the Data Signal coming from the RGB/W controller, allowing installers to make cable runs up to 300-FT, if injecting power at the very end.