The Tikk-Tekk Rainbow Measuring Device is designed for the visually-impaired and uses audible sounds to track measurements.
Two rings are slipped over the two index fingers and a measuring stick in between that loosens as it is stretched. A ‘tikk’ sound is made after every centimeter and a ‘tekk’ sound after every five centimeters. For added readability, the Tikk-Tekk also has embossed Braille readings as well as a digital display.
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