Gaming Keyboard MARVO KG951LED Backlit Wired Mechanical Gaming Keyboard with Blue Switches 104 keys LED backlit mechanical keyboard, constructed with floating keys, blue switches (Gaote switch/Otemu switch), Programming is not supported (No driver offer) Only Blue LED Light, can switch into Breathing Backlit Mode, default to be medium brightness, press FN + Esc to adjust 3 levels of brightness " into " Only Blue LED Light, can switch into 3 Breathing Backlit Modes, default to be medium brightness, press FN + Esc to adjust 3 levels of brightness:All-key breathing--&gt; 8 keys mode--&gt; 8-key breathing Every floating key with independent blue switch and LED light, Full anti-ghosting, press FN + Pause to switch between 6-key-rollover and N-key-rollover (Notice: Mac OS support 6-key rollover only) FN + F1-F12, convenient function keys; Aluminum top housing with sanded finish, metal base Gold plated USB interface guarantees efficient and stable data transmission (Note: 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.)