Best Inventions of 2001

Inventions come in all shapes and sizes. Some are as simple as purple catsup. Others push the limits of quantum physics. The real measure of an invention is not just how well it works or how impressively it is engineered, but how it changes our lives.

Infrared Smoke Alarm

inventions 2001 smoke alarm

Chris Stein for TIME

Inventor: First Alert

These days every home has at least one smoke alarm. But how many of us have yanked the batteries out in frustration because that annoying shriek goes off every time we broil a steak or toast a bagel? The Smart Alarm offers a cure so simple we should have thought of it: you turn the alarm on and off by remote control. Just point any remote at the alarm and hold down any button for five seconds.

Availability: Now, $30
To Learn More: www.firstalert.com

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