Logitech MX Mechanical Wireless Illuminated Keyboard Switch: Brown Switch, Red Switch, Blue Switch Blue Switch: Mechanical key switch, every keystroke provides pleasant sound and tactile feedback - offering familiar mechanical feel and sound. Brown Switch: Tactile Quiet mechanical key switch gives you a satisfying tactile bump - providing precise feedback, shorter key reset distance, and less noise so your typing won't disturb people around you. Red Switch: Linear mechanical key switch with uninterrupted keystroke travel and minimal spring force - fast response and ultra-smooth typing experience. Low-profile keys, more comfort: Keyboard layout design enables easy precision, full-size form factor and low-profile mechanical switches offer better ergonomics. Smart lighting: When your hands approach the wireless keyboard, the backlit keys will illuminate, and