I took a replacement, which had served its purpose, Razer Anansi. At the first check everything was fine. I noticed the first defect after about 10 minutes, it was a staggering and backlashing D key. I scored on such a defect, because it did not interfere with the game and typing at all. A couple of hours after installing additional software, the backlight began to flicker quickly, this was the second defect. This flickering could be removed only by turning off the backlight. In the service, this was recognized as a marriage, they wrote a conclusion for the store, and there they already returned the money to me. Conclusion: if you want to take a mechanical keyboard, then it's better not to save on such junk. As they say - "The miser pays twice", I spent both money and nerves, and only money was returned .