Deep Penetrating Light therapy was first used by NASA to treat injuries in space. Light Therapy targets swollen joints, inflammation and stiffness with healing LEDs by penetrating deep into muscle tissue. Helps with cellular regeneration, faster healing and pain relief. Use a few minutes a day. Choose Original featuring 60 powerful pain-penetrating LEDs or Oversized providing 72 LEDs and an adjustable strap for hands-free use. Non-invasive and drug free. FDA listed. Includes AC adapter. Auto shutoff. Original 7½"L x 2¼"W x 1¾" H; Oversized 7¾" L x 3½"W x 1½"H.