Acmee 4 Pairs Stylish LED Blinking Studs Earrings Shinning Flashing Crystal Pendant for Party Festival (Multi-color, 4 Pairs) It will change to 7 colors when ligh up Item type: Studs Earrings Gender: Women & Men, Unisex Size: dia.6mm Material: CU Battery: LR521 button battery (included)