Get flashy this St. Patrick's Day in these zany Flashing Shamrock Sunglasses! With sturdy plastic rims that have lights within, these novelty glasses include 3 batteries. You can adjust the flash modes to different speeds as you wish! Glasses are for novelty use only, and do not have UV protection. Flashing Shamrock Glasses measure 7in wide x 2in x 3 1/4in.