Come and see our amazing products. The outer material of the led luminous silicone bracelet is ABS, and the strap is made of silicone. The battery requires the CR2032 model, which supports multiple color shifts. Many people use it for program celebrations, event cheers, birthday parties, concerts, and can adjust the atmosphere.Size:2 3/8" x 2 3/4 " Pls confirm with us about the packing info, stock color and exact production time before placing your order