No batteries and external power supply, it will illuminate after water flows down.
Automatic light switching.
7 colors are displayed automatically when water flow.
Main colors are Green, Red & Blue.
Fits all standard connectors, easy to install.
Offer you a delight bath & a wonderful experience
Ideal for bathroom to make it more fantastic.
Case Material: ABS
xternal thread diameter: 2.0cm Item size: about 20 * 8 * 3.3cm (Length * head diameter * handle diameter)