Inline RGB LED controllers are controllers that are wired in-between your transformer and your LED tape. They are typically used for very small installations, because they can't be linked together to manage more LED tape than a single control-unit can controlInline RGB LED controllers are controllers that are wired in-between your transformer and your LED tape. They are typically used for very small installations, because they can't be linked together to manage more LED tape than a single control-unit can controlInline RGB LED controllers are controllers that are wired in-between your transformer and your LED tape. They are typically used for very small installations, because they can't be linked together to manage more LED tape than a single control-unit can control