[Light color]: red light, yellow light, blue light, green light, orange light, white light, pink light, colorful gradient (discoloration - blinking - off)
[Using the battery]: The product itself comes with 2 original button batteries (originally CR2016), the long-lighting time is about 40 hours; the battery can be replaced by itself, and it can be sold at convenience stores or supermarkets.
[Commodity specifications]: Adjustable cap circumference: 50cm-58cm (6-piece cap) manual measurement, measurement method and tape measure are different, the error is kept at about 2cm
[Product color]: The hat adopts 108*56 cotton twill fabric by default, and can customize other color fabrics and materials according to customer requirements.
Light source description:
The LED light emits light, and the entire optical fiber is illuminated by the PU light guiding optical fiber strip to achieve the warning safety function. This product is often exported to Europe and the United States and other countries, can pass CE, ROHS, EN471 environmental certification, remove the switch box, line lights, light guide bar can not move when cleaning.
Applicable to dark environments or night activities gatherings, outdoor sports, trade fairs, LED light-emitting, warnings, and personality, design generous, suitable for day or night.

How to use: Adjust the working mode of the product through the switch (long light - fast flash - slow flash - off)

Size: adjustable range 50-58cm