What is the Light Source of the Hat? - The light source of the hat is the luminous, also called cold light ( ), the principle is electroluminescence. Mainly adding positive and negative poles to the luminous to excite the luminescent powder material to light. - The cold light has the characteristics of light, energy saving and environmental protection, and does not hurt the eyes; the thread body is, easy to bend into various shapes, and can be cut at will. - This is an incomparable advantage of LED lights, and the service life is about 5000 hours. Comes with 1. 5V Flash Driver Function: Constantly on, flashing, off Voltage: 1. 5V ( ) How to operate: Toggle the , turn it to the left to, turn it to the middle to turn off, turn it to the right to turn it off. Features 1. light, energy saving and environmental protection, not hurting the eyes 2. The wire body is and easy to bend into various shapes 3. The service life is to 5000 hours Parameter Name: luminous hat Material: environmentally friendly Weight: 120 grams Size: circumference 56- 58cm, height 10cm Packing: bag Package list: 2 x 1. 5V LED Jazz Hat Flashing Fedora Falshing Performing Fancy Dress Party ( Red Light )