Come and see our amazing products. This three-in-one key chain has a whistle and a bracelet.It can be hung on a bag,backpack and somewhere else,it also can be wore on your wrist.It's portable,lightweight ,multi-functional and useful.The whistle's size is 2.2 " x 1 ",it can be used in the evening to draw people's attention to get help when you are in danger.It's also suitable for sports use,like running and so on.Price over 20000pcs is via sea shipment.Price subjects to change without notice,please verify with supplier. Pls confirm with us about the packing info, stock color and exact production time before placing your order.