Signal

Inspired by the blue-ringed octopus, researchers have created a technology that rapidly changes color and appearance under various kinds of light, enabling camouflaging and signaling. The tech could be used in the military, medicine, and robotics.

The SEIL LED grid signaling system for cyclists features bright left or right arrows, stopping signals or custom animated text messages that shine through the fabric at the back of the bag at the press of a button on a handlebar-mounted wireless controller.

Researchers at the military technology firm Chamtech have developed a special aerosol spray that can essentially add an antenna to whatever it's sprayed on and improve the network coverage in the area.

Penn State researchers achieve 1Gbps wireless data transfer using light

If you don’t trust that shifty-looking night supervisor at the motel or the suspicious-looking smoke detector in your room, you might consider investing in the Chinavision CVMV-J19 Spy Wi-Fi Signal and Camera Lens Detector.

The PowerFlare PF-200 is a reusable, non-combusting electronic LED safety light, which is designed to be used by emergency services and military personnel.