STRAC, stands for Symbiotic Terrain Robotic Assist Chair.  Although STRAC, features some of its predecessors functions like artificial touch, artificial instinct and facial feature controlled actions, its improvements include Self Therapy. It may also be the most powerful wheelchair ever built. It’s base is an all terrain design that is strong enough to pull a car.  STRAC, is capable of climbing hills, curbs, and can tilt itself to compensate for the  slant of the ground, raise and lower the patient, speak to the user to inform about it’s current status, sense the patient’s facial movements & react to those movements by creating appropriate actions in its autonomous base and two exoskeleton arms and metal fingers. It also features an automatic navigation system that can “see”  in light or dark to assist in avoiding obstacles.  The chair sees using short busts of ultrasonic sound bounced off objects to judge distance. STRAC also has an improved pen attachment that allows better reach and  more dexterity when drawing and writing.   In all,  STRAC has the potential for 40 different functions and is upgradeable to hundreds.   The chair operates on 24 Volts.
    STRAC’s, wheels are unique triangular multi wheel devices, designed to climb uneven surfaces. The idea behind STRAC, is to give paralysis victims hands on interaction with their environment and the durability to challenge the outside terrain.
    STRAC, also sends information about it’s status to the patient by beaming it into the top of the lens of the eye. There is no need to look down at a control panel which had been a short coming of the original chair. STRAC’s  console is always a glance away and held in permanent focus to the patient’s eye.
  

   STRAC II, is already being planned, however is dependant on available funding. It will be a streamlined, light weight version of STRAC.  STRAC II will be forty percent lighter and have increased dexterity and modes of operation.  The ultimate design will literally form to the patients body and be light enough to be easily handled.