1. Personalized LED heart-shaped crystal keychain with gradient multi-color conversion light. 2. Made of high quality crystal material with metal keychain. 3. Using the button on the top of the crystal, tighten the lamp clockwise, the lamp will turn on, and release it counterclockwise, the lamp will turn off. The button is replaceable. 4. This crystal keychain is equipped with pink 3d engraving on the crystal part and is illuminated by LED. 5. Perfect Christmas gifts, wedding gifts, Valentine's Day gifts, birthday gifts.