The other option is a nitrogen tank hooked up to a regulator. Costs 20 bucks to refill and only have to do it about once every 2 months with regular use.

Also dont have to worry about constant noise, or maintenance

 

YEA RIGHT THE TANK WOULD LAST LONGEER THAN 15 SEC ON ONE FILL UP.
U HAVE TO HAVE A COMPRESSOR TO AIR THE TANK UP IF U USE THE HORNS MORE THAN ONCE
ALSO HAVE TO PICK A 100% DUTY CYCLE COMPRESSOR LIKE A AIR ZENITH

 

I never said that the tank wouldnt last longer then 15 seconds on just a regular tank.

Just stating that with a nitrogen tank that is compressed at 2,800 psi that even a little 3 liter bottle will last you a couple months.

I plan on going with a 5 liter bottle mounted in the back that thing will only need to be filled up 3-4 times a year