Light up the season when you engrave your personal logo or message on these LED Light Up Keychains with On/Off button. Choose from a heart, star, round, or square shape, and then select one of the LED light colors. You can choose from a vibrant purple, yellow, pink, red, blue, white or green to bring that logo or message alive! Easily clips onto your backpack, keyring, travel accessories, pet collar and so much more! Batteries will last up to 24 hours and can be replaced.