Transcutaneous electrical nerve stimulation (TENS) is a therapy that uses low-voltage electrical current for pain relief. You do TENS with a small, battery-powered machine about the size of a pocket radio.
User Experience (UX) Design: Concept Definition. User experience (UX) design is a process of creating products that provide meaningful and personally relevant experiences. This involves the careful design of the usability and pleasure derived from using a product.
A hex screwdriver is a type of screwdriver that features a hexagonal tip for driving certain nuts, bolts and screws. Hex screwdrivers, like all types of screwdrivers, are available in an extensive range of both standard and metric sizes.