Anybody have a clue as to how much current an automotive airhorn like this one: http://www.amazon.com/gp/product/B001CS6C9M/ref=oh_details_o01_s00_i00 ... would draw ? The product description is of no help. The meager instructions show a 30amp fuse, so I assume it's a lot of juice. My multimeter only measures up to 10 amps so I'm afraid of blowing its fuse. I'm not going to use it in a motor vehicle, so I'm a little perplexed as to how to power it. I'm actually going to use it to attempt to frighten away nuisance birds. It's the last stop for them before Mr. 20 Gauge, so they'd appreciate your help !