PoNS™ is an investigational device in the European Union (EU) and Australia (AUS); PoNS™ is under review for clearance in AUS. PoNS™ is not commercially available in the US, EU or AUS. PoNS™ is an authorized medical device and commercially available in Canada where it is intended for use as a short term treatment (14 weeks) of chronic balance deficit due to mild-to-moderate traumatic brain injury (mmTBI) and is to be used in conjunction with physical therapy and as a short term treatment (14 weeks) of gait deficit due to mild and moderate symptoms from MS and is to be used in conjunction with physical therapy.