Sonicator Applicator for 992 994 or 930 5 CM 1.0 3.2 MHz Exercise Mats Air discharging: full automatic Air Otoscope Accessory Air discharging: full automatic Air rapid exhaust mode Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red green blindness each in two forms complete and incomplete * Includes four special plates for tests to determine the kind and degree of defect in color vision * Makes use of the peculiarity that in red green blindness blue and yellow appear remarkably bright compared with red and green * Color plates encased in specially designed album type books for ease of handling * Detailed instructions included Sonicator Plus Head for ME 992 994 or 930 applicator (5cm 1 3 MHz)