Bagel Smart Tape Measure
An ingenious digital tape measure that can measure length or circumference using its retractable string, oddly-shaped paths using a roller, and distances using an ultrasonic sensor. Data can be tagged using voice memos, then sent wirelessly to an app on your smartphone.
Crowdfunded projects pose a degree of risk for buyers, so be sure to do your research and fully read the seller's detailed description and production plans before plunking down your hard-earned money.
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