HAVIT RGB Backlit Wired Mechanical Gaming Keyboard with Blue Switches 104 keys RGB mechanical keyboard, constructed with floating keys, blue switches (Gaote switch/Otemu switch), programming is not supported (No driver needed). Adjustable multiple backlit mode (including unique marquee mode), all the backlit modes are pre-programed, therefore key-by-key backlighting adjustment is not supported. 4 levels of brightness and 10 levels of breathing rate, Aluminum top housing with sanded finish, metal base(Note: Additionally, it allows backlit brightness adjustment by pressing FN + Up/Down Arrow Key in any non-breathing mode). Gold plated USB interface guarantees efficient and stable data transmission (Note: RGB mechanical keyboards take a bit more power than the traditional keyboards, it would be better for them to work with desktop since some older USB 2.0 laptops may not be able to provide enough output. Similarly, it may work better with USB ports locating at the back of the computer case than those in the front). Every floating key with independent blue switch and LED light, Full anti-ghosting, N-key-rollover technology-All keys can work at the same time (Notice: Mac OS support 6-key rollover only).