20mm, Standard 1/2 inch connection (compatible with all standard shower hoses with size);  Type: A - Temperature control color;  B - 7 colors;  Feature: - LED shower,LED color changes at random when showering;  - Soft water,pressurized design;  - Shower head changes the colour of the water coming out by using built-in LEDs;  - The LED shower head is hydro-powered, but the user needn't worry about if it will be leakage of electricity;  - The shower head handle connects directly into your shower pipe;  - Do not require battery and power supply, the shower head light by LED, when you open the shower head, the water pressure will activate LED automaticly;  - Built-in mineral beads negative ion purification filtration, removes heavy metals, chlorine, bacteria and impurities,improving your shower quality;  - The energy balls in the shower head can increase your cell vitality and make your skin healthy. (It is suggested that you change the balls once a month.;  - Very easy to fit onto your e*isting shower;  Simply unscrew the old shower head and screw this one back in its place, offers a very soft yet powerful spray and removable for easy cleaning;  - Feel the romance in colorful world and enjoy the LED light Spa therapy;  Package Include: 1*Shower Head (no hose)