AA batteries(Not included) to work and Halloween purge mask can last for more than 48 hours. After all, nobody spends hours making their costume just to begrudgingly put it on once it’s done. For your 100% satisfaction, batman costume adult we are proud to offer a 90 – day warranty with our Halloween Scary Mask. Let this glowing mask light up the Halloween Trick or Treat Night. This halloween Led mask 2 pack will make sure you stand out of the crowd.