A treatment with SonoPro does not have to affect your daily life. All you have to think about is to replace the patch once a day. The patch is placed locally on the hairless skin on the projecting portion of the skull behind the ear. Clean the skin area before applying a new patch for the best possible result. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.