The UK74 Dedicated Camera Trigger Cable from TriggerSmart is a non-standard cable that connects your camera to the UK1 TriggerSmart Controller. This cable is not included as part of the TriggerSmart Kit but can be purchased separately to fit specific cameras when using the TriggerSmart system. The cable has 2.5mm jacks on both ends and is compatible with Nikon D90, D5000, D7000 cameras. For other cameras, a different dedicated cable must be purchased. The cable is an 18" (45.7 cm) coiled cable, when not stretched.