1. electroluminescent technology to brightness 2. 100% cotton 3. 5 flash 8 segment flash pattern 4. high luminescence efficiency, low energy consumption, no heat 5. for fashion 6. customs design are welcome Instruction 7. slide the control box open and place a 2032 button batteries 8. push the button to control the EL sheet flashing patterns 9. We also can do for your logo in the cap 〈 Prev 3 / 8 Next 〉 EL cap/EL hat/EL flashing cap/EL glowing cap click for larger photo