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Meet the 369Sonic Ultrasonic Kitchen Knife: a powerful knife that uses 50,000 blade movements per second to cut through things more efficiently. It comes with an ultra sharp stainless steel blade, Titanium transducer, and a heat resistant non-slip handle cover.
An app is in the works for this knife that will let you see frequency, battery voltage, and temperature. This project is getting funded on Kickstarter.