Come and see our amazing products! This multi-color light-up LED lanyard is made of TPU flat optical fiber, F5 super bright LED, ABS switch box and hook. Two batteries are included and installed which can last about 60 hours continuously. a great item for trade show, events, and night activities. You Can laser engrave your logo on the lanyard or sticker on the switch box. Pls confirm with us about the packing info, stock color and exact production time before placing your order