The Bloody B840 is a bit of a chimera, having optical switches which incorporate a metal knob in each key to produce a click when a button is fully depressed like a mechanical keyboards keys.  Their LK Sound Creator Tech makes the keys similar to Cherry Blue in terms of travel distance and actuation force, but the actual keystroke is registered with the infrared beam that comprises the optical switch.  TechPowerUp is working on proper testing for keyboard response times, the tests they tried showed that the optical technology on the Bloody keyboard is technically faster to register a keypress, but not so much that they noticed it during use.  You can see their full review here.

"Bloody is a new gaming peripherals brand A4Tech recently introduced. Today, we take a look at their new B840 keyboard with the new optical Bloody LK2 switch. It promises a long lifespan, extremely fast response times, and a clicky response, which is new for optical switches."

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