I have enjoyed the response of the Curayou Team in helping me with all my questions. After buying the oral redlight device and my dentist giving telling me that my gums were looking better with my numbers dropping. I decided to purchase the Neuropathy Light Therapy System for me and my wife. The medical grade, research, versatility of the device (feet, knee, back, etc..) and the ability to adjust the Frequency were the main reason for purchasing the NLTS, after researching all the devices for Neuropathy in my feet. Curayou NLTS was the only device I found that could address our different problems with one device. My wife and I both have immediate relief on our knees after using the NLTS and the relief is lasting longer as we continue to use the NLTS regularly. The reason for buying the NLTS was Neuropathy in my feet, I am seeing some improvement with my feet after 3 weeks of regular sessions with the device using Curayou protocol. I am sold on REDLIGHT THERAPHY AND CURAYOU. At 71 years old, I only wish I had found both Redlight Therapy and CURAYOU sooner. Thanks to everyone at CURAYOU Respectfully Pops