Quick Details Sports Cap Type:Baseball Cap Panel Style:6-Panel Hat Age Group:Adults Gender:Unisex Material:100% Cotton Fabric Feature:Common Size:Customized Style:Striped Pattern:Plain Name:blank baseball cap with built-in optical led light Back closure:snapback, fitted, buckle , leather strap baseball cap logo:embroidery , embossed , printed ,woven-label , patch brim:customized Light colors:customized MOQ:600PCS Selling Units:Single item Single package size: 58X48X37 cm Single gross weight:0.090 kg Package Type:100pcs/144pcs/150pcs per carton, 24pc/polybag/inner box, 25pcs/polybag/iner box, 1pc/polybag   Feature [Usage method]: The product working mode can be adjusted by the switch (long light-fast flash-slow flash-off) [Light color]: Red light. Yellow light. Blue light. Green light. Orange light. White light. Pink light. Colorful gradient (change color-flicker-off) [Battery]: The product itself comes with 2 original button batteries (original CR2016), with a long bright light time of about 40 hours; the battery can be replaced by itself and is available at convenience stores or supermarkets. [Commodity specifications]: Adjustable cap circumference: 50cm-58cm (6 caps) manual measurement, the measurement method and the tape measure are different, and the error is maintained at about 2cm [Product color]: The hat is made of black cotton brushed fabric by default. Other color fabrics and materials can be customized according to customer requirements. Product desciption: 1. The design is based on the humanistic concept: safety, fashion, thoughtfulness, liveliness, beauty, etc. 2. Cotton cap + PU light guide fiber 3. Guarantee quality: Each process has passed our inspection, anti-oxidation and corrosion test. 4. Pay attention to details: Every detail must be tested.     Light source description: The LED light is illuminated, and the entire optical fiber is illuminated through the PU light guiding optical fiber strip, so as to achieve a bright warning safety function. This product is often exported by foreign merchants to Europe, America and other countries. It can pass CE, ROHS, EN471 environmental protection certification. When cleaning, remove the switch box and line lamp, and the light guide bar can not move. It is suitable for dark environment or night party, outdoor sports, and trade fairs. It emits light through LED fiber, which plays a role of warning and expresses personality. At the same time, it is generous in design.     Size Information Washing care: When cleaning the hat, remove the switch box and the line lamp, and the light guide bar can not be moved. Size Chart of This Design