Aircraft Digital Gauges offers digital engine gauges, and/or associated products,are not CAA, or FAA certified or approved. They are sold and intended for use only under the setforth guidelines associated with and regulated by the FAA or CAA (or other authorities having jurisdiction) with regaurd to amateur built, non certified experimental class aircraft. The responsibility for the proper installation, safe use and maintenance lies solely with the aircraft builder / pilot, or any future owner or pilot in command of aircraft where installed.