This is a set of 2 LED lights and bands used for Captain Duck and Ham-chan. #Captain Duck & Ham-chan List narupon The switch is activated by pressing the light-emitting part. OFF → Blue flashing → Random colorful speed change flashing → OFF ・Can be attached directly to a bicycle! ・We ship after confirming the flashing. ・Battery replaceable (CR2032 x 2) #Captain Duck & Ham-chan List narupon 24-hour instant purchase OK, no comment needed. Please note that we do not offer discounts. Thank you very much.