Rokou Outstanding Light Glowing LED Earrings Ear Drop Crystal Pendant Material: Stainless steel earring with Cubic Zirconia stone Power: 1*LR521 button battery (replaceable, included) Size: Approx.8mm(diameter)*15mm(Length) White ,green ,pink ,yellow,blue ,purple ,red ,color changing ,8 colors for your choice ! Great for holidays, costumes, and parties