How Long Can The Light Up Tambourines Stay On? - 3 batteries are included in each tambourines, which make it longer life & brighter . You can turn On/Off for saving battery life and replace batteries for reusing.^Why it will make our party so fun? - The LED Tambourines can shift between 3 Modes: fast flashing, slow flashing, and alternately flashing. Flashing light up will be a hit at your party.^Where Can I Use Flashing Tambourine? - Perfect for concert ,wedding, birthday parties, clubs, sporting events, nightlife, raves, festivals, bachelor/bachelor parties and any other night time event. Also a Good toy for your children playing.^Are Tambourines Toys Safe? - durable hard plastic, all products are CPSIA Compliant. Bringing tons of fun for children and adults.^