What an ineffective object .... !!!!

From first glance, it is believed to have made the purchase that will get rid of harmful for long ... but in fact, we must believe that these small rodents are more cunning than humans, and for good reason, mice habituate soon to ultra sounds ..... !!!!!
The party seems lost in advance .... but man has not said its last word ..... radical means, having a cat at home ... and more mice! in addition, we can make big hugs his cat, which makes us understand purring well .... !!!!!