The Hydros X4 is the perfect and affordable starting place to jump into the Hydros System. This controller works great and includes: - the power supply, - PH probe, - Rope water leak detector, - water level sensor - a hydros compatible power strip to add 4 hydros wifi power outlets - and a command bus cable, I have several other Hydros controllers and products listed for sale as well as lots of add ons such as ORP, PH, and Temp sensor​/​probes, water leak detectors, etc. PM me for a custom package and price!!