Come and see our amazing products. This promotional gift made of premium ABS material. Measured size in 2.16" L x 1.06" W x 0.6" H, comes with a chain ring and installed battery. One high light led helps you to find your way in the dark. All you need to do is clap, whistle or shout. Any loud noise over 1000-1200hz causes beep and the light to flash. The price is includes shipping cost to ca. Normally 4 colors(Black, Blue, Red, White) you can choise from, quantity over 2k accept customized PMS color. Pls confirm with us about the packing info, stock color and exact production time before placing your order