Turn your shower into a private wellness oasis! The rainbow LED colors light up using the power of water pressure, cycling every 2 seconds from red, blue, green, yellow, white, orange and violet. These rainbow lights and water combine to provide a calming and revitalizing effect on body and soul. Easy to use; just replace your current shower head, or attach it to a standard shower hose (with 1/2″ thread). Environmentally friendly–no batteries needed!