Why would you want to train your dog using a device that absolutely scares the living crap out of him and makes him uncomfortable for hours, to the point he will not eat and does not want to come inside his own home? Just, what?
Instead, get a bag of cheese or deli meat and teach him a 'leave it' cue. Yes, it certainly takes more time than using sound to scare your dog into compliance, but it will be much more effective in the long run. Using a scary noise to dissuade a dog from a certain behavior has a high chance of backfiring and accidentally teaching your dog to fear something else, like say other dogs on the street, a stranger, or a fire hydrant rather than garbage.
Instead, get a bag of cheese or deli meat and teach him a 'leave it' cue. Yes, it certainly takes more time than using sound to scare your dog into compliance, but it will be much more effective in the long run. Using a scary noise to dissuade a dog from a certain behavior has a high chance of backfiring and accidentally teaching your dog to fear something else, like say other dogs on the street, a stranger, or a fire hydrant rather than garbage.