Detailed Product Description Features and Function of solar key ring : 1) Material: acrylic , Metal ring on the top, easy to take 2) Sizes: many ... movable, can put photoes and any other picture in the key ring at c) Put customer's logo inside, airproof d) can ... and logo can twinkle alternate ( alternating keychain ) 6) Powered by light converted energy, lasts for more than ten years , any time ...