Our festive and regal King's Crown Sunglasses are a must-have keepsake for your Prom King! And they're great for a Mardi Gras or masquerade Prom theme. The purple sunglasses feature flashing lights, so they blink with the press of a button. The button activates 3 lights modes: flash, blink, and steady light. Includes 3 replaceable AG13 batteries.