【75% TKL Layout & CNC Multifunctional Knob】 The wireless keyboard with a portable 81-key layout retains essential keys while saving desk space, compact and lightweight for gaming, office work and business travel. Equipped with an integrated CNC multifunctional knob to adjust backlight settings quickly and switch to multimedia mode via long press for convenient volume and playback control 【Hot Swappable & Leaf-Spring Gasket Structure】 Upgraded leaf-spring gasket structure with 5-layer sound-absorbing foam and 1.2mm slotted PCB eliminates keystroke cavity noise and vibration. The X85 keyboard supports tool-free hot-swappable 3-pin switches, providing smooth, soft and stable typing feel for personalized gaming experience 【Triple Mode Connection & Ultra Low Latency】 Supports Wired, 2.4G wireless and Bluetooth triple connection modes, fully compatible with Windows 2000/XP/Vista/Win7/Win8/Win10/Win11 and Mac OS systems. It supports 3-device fast switching via FN keys. Built-in advanced chip ensures ultra-low wireless latency for responsive gaming and office operation