Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual electronics3 4G wireless & USB wired

4G wireless & USB wired 3 in 1 connection design

After using it for a week

AUSTOR 24 Pieces Wool Felt Mounted Mandrel Set with Free Box Features High purity No impurities

CE ROHS UL94V-0/94-2

2004 - 2014 Scion xB

Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual electronics3 4G wireless & USB wiredIshihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual The test consists of a number of colored plates, called Ishihara test plates, each of which contains a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red green color vision defect, or the other way around.