This interchangeable keychain has 2 heat-sensitive mood beads on it. They react to body heat, and will shift colors when they are touched. To change beads, all you have to do is unscrew the bottom of the key, and the beads will slide off. A lanyard clip is on the keyring, allowing it to be fastened on a belt loop, a bookbag zipper, or a purse. Total length of this keychain is 4 inches. Your Winged Key Keychain will arrive gift-boxed, and shipping insurance is included in the shipping costs.