"SELF CONTAINED, LIGHTWEIGHT, PORTABLE TEST INSTRUMENT THAT PROVIDES A SAFE MEANS OF DETERMINING CRACKS OR CRACK LIKE DEFECTS IN AIRCRAFT STRUCTURES, MAJOR COMPONENTS AND PARTS, THE TESTER IS BATTERY POWERED AND HAS SELF CHARGING CAPABILITY, PHYSICAL CHARACTERISTICS; LENGTH 26 INCHES, WIDTH 19 INCHES, HEIGHT 15 INCHES, WEIGHT 20 POUNDS, CUBE 4.3 CUBIC FEET"