EMS Neck Care Massage Pro stimulates nerves using low-frequency pulse massage and sophisticated micro-electron technology that helps lymphatic fluid drainage, healthy blood circulation and tightening of neck muscles. When the machine is turned on, small electrical pulses are delivered to the affected area of your body and you will feel them as a tingling sensation. By blocking pain signals from reaching the brain and spinal cord, electrical impulses can help reduce discomfort and relax muscles. 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.