Features: 6 LED Flashing Modes (Only Christmas Necklace with 6 Flashing Modes - Exclusively on Amazon) Large 2 1 2" Inch Premium Bulbs Batteries are Included & Installed No need for Rudolph to guide Santas sleigh when your LED Light Up Christmas Bulb Necklace glows so bright! The nine assorted red, yellow, green & blue light bulbs merrily flash and blink in six different ways with a quick click of the easily operable on off button. Two CR2032 batteries are included and installed, making this jolly necklace ready to rock. Men, women & kids alike can flaunt this festive flashing jewelry. Makes an awesome accessory to an ugly Christmas sweater or colorful complement to a classic Santa hat or reindeer antlers headband, and a perfect holiday party favor or secret Santa gift under $10. Christmas has never been so wearable!