Bluetooth technology is a vital tool for keeping track of anything you need close at hand. Check out our top-rated picks of the best Bluetooth trackers for iOS and Android.

Bluetooth contains radiation, which has prompted unsubstantiated worries about cancer risk. There is no scientific evidence of a link to health risks.

We put this season’s best outdoor Bluetooth speakers through their paces indoors and out, on wet days and dry days, beaches, tailgates, and patios. These seven emerged as our favorites.

The best over-ear headphones you can buy right now tested and rated for sound quality, noise-cancelling performance, comfort and features.

These are the best smart scales for weighing yourself at home and collecting health and fitness stats, according to our in-house testers.

Tested by our CNET fitness expert and recommended by the personal trainers we consulted, these are the best chest strap heart-rate monitors for your workouts.