How does the revolutionary, highly efficient Seurich Pure Advance Light FootFix Device work? The revolutionary, highly efficient Seurich Pure Advance Light FootFix Device uses blue light therapy in combination with infrared cold laser technology to effectively eliminate fungi, inhibit inflammation and prevent infections. This relieves nail pain and swelling, eliminates pus or pustules, inhibits itching, peeling, thickening of nails and other problems. What makes the revolutionary AEXZR Revolutionary High Efficiency Light Therapy Device for toenail diseases so special? 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.