Bloody B820R world’s first lightning speed mechanical Switch keyboard features a unique design, high-quality precision and state-of-the-art technology. Focusing on details, convenience and ergonomics makes it a great keyboard for any serious gamer. The Innovative LK optical switch technology uses optical detection that removes all input lag which is able to obtain zero digital latency reacting with a speed of 0.2ms key response. LK Optic Switch travel with distance of 3mm, which is 25% faster than traditional metal switch. (Traditional metal switch travel at distance of 4mm). LK Optic switch has a life span of over 100 million keystrokes. Customize freely 3 types of RGB Animation modes with 16.8 million colour options, making your own unique "Self-Customize" RGB. 6 Types of lighting effects are preloaded in the keyboard by default. Adjust the lighting effects by pressing the "FN" keys with "F12" keys to rotate without driver.