Hold onto your hard hats' boys! Everyone will want this drinking hat with 2 can holders complete with straws, this is a total hands free' drinking experience & when the beers run out grab the microphone attached & sound the alarm.literally! This hat comes complete with 6 sounds Police Siren, Phone Ringing, Dog Barking, White Noise & Car Crash or simply use the megaphone to shout your beer order through. A great laugh for the lads on Stag Parties, at Sporting Events or a Boys Night Out! 9v Battery Required but not supplied.