Manual controls VELUX manual controls provide an economical option for controlling VELUX manual venting skylights, roof windows and sunscreening accessories. ZCT 300: 6'–10' manual telescopic rod Operates venting units with a smooth-turning operation. ZXT 200: 3'–6' Telescopic rod for blinds For operation of manual blinds. ZCT 100: 3' rod extension Attaches to the ZCT 300 Control Rod to extend an additional 3'. ZZZ 201: crank handle Handles are available to operate VS skylights in within-reach applications. ZZZ 211: crank handle Handles are available to operate VCM skylights in within-reach applications.