Bloody's new LK3 optical gaming keyboard switch is addictive to use. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. I stopped by Bloody's ...

KYOCERA Optical Blood-Flow Sensor Is Among World's Smallest for Wearable Devices, Smartphones. Potential mHealth applications utilize earbuds and other devices to sense stress levels, ...

The device also uses optical flow sensors to track movement against a 2D surface. A button between the forefinger and thumb is used in place of the left-click button on a standard mouse.