LU2000 Personalized Souvenirs Custom Your Own Photo Text Etched Laser Engraving Custom LED Laser Engraved Crystal Glass Keychain Key Rings - Circle Shaped Octagonal Circle Shape LED Lighting color changing crystal key ring keychain, useful in festival activities, best gifts and souvenirs for classmates, friends, couples, lovers, wedding gift, pets tags personalized, if you want a photo customized on it, please always send it via message board as a attachment, a JPG format photo will be best one Light will be changing in 7 colors gradually, batteries includes in packaging Material: Crystal Glass, and eco-friendly zinc alloy, Iron Approx. Diameter: 35mm, that is 1 3/4 inch Good memory souvenirs for every party, festival, weddings, dogs and cats collections, promotional items for your company Logo, friends name or portrait, pets, etc