Q: Is this product compatible with any hose?

This Hose Connector with Flow Control is suitable for any hose with standard ¾" GPT threading. 

Q: What is the benefit of the Hose Connector with Flow Control?

It has a ball valve inside that allows you to turn the water flow on or off and to adjust water pressure when needed or easily change between watering accessories. This makes it a convenient addition to your hose.