How to Use
1. Hold the object to be measured between the jaws
2. Read the closest inch marking from the ruler
3. Read the fraction from the Mechanical Braille Display
"How do you use a ruler if you're blind? This tactile caliper comes with an ingenious manual refreshable braille display built in - and it doesn't require batteries or a plug!"
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"I am impressed by the potential impact the Tactile Caliper possess for improving my students' ability to participate in STEM (Science, Technology, Engineering and Math) activities"
Teacher of Students with Visual Impairments