Discover how blue light affects eye health and sleep, and how smartphone manufacturers tackle these issues with filters and features.

Product Preview is a weekly series spotlighting the latest and greatest debuts in the marketplace. Check back every Friday ...

With powerful armament, and other accoutrements such as thermal infrared scanners, unidirectional microphones and cameras, built-in mobile telephone, computer and modem, and a U-MATIC Video Cassette ...