TrolMaster modules and sensors all come complete with a RJ12 16ft cable, Y-splitter and RJ12 4 ft cable to connect to the Hydro-x. When connecting modules that are farther apart, you can use the Extension cable set ECS-1. The ECS-1 comes complete with another 16ft cable, Y-splitter and 4 ft cable.
1 x Male to Male 16ft RJ12 Cable
1 x Male to male 4ft RJ12 Cable
1 x RJ12 T-Splitter