The wireless controller has been thoughtfully created with a hybrid interface to aid the transition from mechanical to digital. Simply turn the product on, twist the outer ring to increase water flow and press the plus or minus to increase or decrease the temperature. For more safety and comfort, an LED ring gives visual feedback on the water temperature. This is the most price sensitive digital device we have ever created. Reducing the gap between mechanical and digital means more people have access to this wonderful technology. Digital technology will not only enhance the experience in the bathroom, but save an immense amount of water.