25 Percent Faster Keystroke Lk Optic Switch Travel With Distance Of 3Mm Which Is 25 Percent Faster Than Traditional Metal Switch. Traditional Metal Switch Travel At Distance Of 4Mm Dual Programmable Keys M1 And M2 Smart Quick Access Keys Designed To Provide The Convenience To Easily Obtain A Quick Access To Frequently Used Keys. The M1 And M2 Quick Access Keys Are Preset As Ctrl Alt Function Keys. Adjustable Backlights Press Fn Plus F12 To Adjust The Lighting Effects. Press Fn Plus “↑ ↓ To Adjust The Light Brightness. Spill Resistant Nano Coating Exclusive Advanced Nano Coating Over The Pcb Board Protect The Pcb From Corroding By Wet Air Or Caustic Chemicals Prolonging Your Keyboard . Full N Key Rollover Full Nkro Ensures Each Keypress Can Simultaneously Register Regardless Of How Many Keys Are Being Pressed Or Held Down At A Time Including Modifier Keys Shift Control And Alt .