Razer introduces 'opto-mechanical,' IR laser-based switches with the Huntsman mechanical keyboard | TechSpot
Razer's Huntsman Elite opto-mechanical gaming keyboard is on sale for $160 | PC Gamer
WTF are Optical Mechanical Keyboard Switches??? - YouTube
What makes ASUS ROG RX optical mechanical keyboard switches so special? | ASUS gaming keyboards featuring new ROG RX switches offer superior gaming performance and the most stable, tactile typing experience around.