Mechanical Brown Switches: Offering the satisfying tactile typing experience, also being ever so slightly quieter, fitting for office or gaming use. And you will get 8 spare switches as a gift.18 Backlit Modes: Press FN + INS-PgDn to enter Pro-gamer mode. RGB LED adjustable lighting with 6-themed backlights -18 lighting models. You can also adjust their brightness with FN+“↑”and“↓” Besides, there is a 9-color single backlit mode for this keyboard.N-key Rollover, Ergonomic And Durable Design: This keyboard is made of full metal material, with matte-finish texture, solid enough to protect it from scratch. It allows multi-keys to work simultaneously with high speed.Self-design & Removable Keycaps: The Redragon K556 features a custom designed keycap that has been made shorter to reduce the time it takes for your actions to register. Include a keycaps puller for clean or other needs.Wide Compatibility: Support computer system including Windows10, Windows 8, Windows 7, Mac OS X, Windows XP, Windows VISTA, etc. Product Description Features Anti-ghosting with 104 Standard Keys Fully anti-ghosting keys deliver reliably accurate performance to players without any program error. Fully Anodized Aluminum Frame Brushed Extreme durability ensures that players do whatever they would like. 8 Spare Switches Providing 8pcs spare switches, including blue, brown, red and black switches for you to try the different mechanical key switches to enjoy the special experience. Dimension/size 17.1×4.9 in 17.2×5.8 in 13.9×4.1 in 12.2×4.1 in 17.1×4.9 in 12.6 x 4.3 in Keyboard Weight 1.18 kg 0.73 kg 0.51 kg 0.47 kg 1.06 kg 0.67 kg Switch Type Brown Switch Red Switch (Low profile) Red Switch (Hot-Swap) Custom Switch (Mint Lemon) Red Switch (Hot-Swap) Red Switch (Hot-Swap) Keys 104 104 78 68 104 61 Connection Wired Wired/BT/2.4Ghz Wireless Wired/BT/2.4Ghz Wired/BT/2.4Ghz Wired/BT/2.4Ghz Wired/BT/2.4Ghz Extra G Keys 0 5 0 0 0 0 RGB Backlit Software