These light up Aurora heart LED color changing pins are small, lightweight, bright, and will last for 8 12 hours if left on constantly (batteries are replaceable). A great promotional item for wedding planners and dating services, these light up pins make fun party favors for any occasion. Add an imprint of your company logo and use them for concerts, hand outs, parades, Valentine's Day, holidays, tradeshows and nighttime events! Aurora Heart LED Pins come ready to use with 2 replaceable CR927 Batteries.