Microcurrent is a form of low-frequency electrotherapy in which the Ceoerty AlwaysPulse EMS microcurrent leg aid uses electrical pulses to promote muscle activity. When applied to the muscles of the legs, it mimics signals that normally come from the central nervous system to control muscle movement. This can increase muscle strength and ultimately make leg muscles firmer and more defined. Ceoerty AlwaysPulse EMS Microcurrent Leg Support Four Features: 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.