•12 Backlight Modes: RGB backlight design, support random 7 colours, 7 single colours, and more light modes, cool and visible at night, perfect for a gaming room, also a good helper for efficient work. •Easy Operation: You can easily change light modes and adjust brightness & speed through pressing different Fn combination keys, like FN key plus "←" key for changing the front lighting effects. •Smooth and Accurate Operation: 21 programmable keys with light Huanuo purple shaft, which supports hot-plugging of all keys, providing fast and precise button functions. •Compatibility: Works well with desktop computers and laptops running with WINXP/ WIN7/ WIN8/ WIN10/ WIN11/ MAC systems, connected by a USB cable. •Well-made of quality material with advanced technique, the keys are tested to withstand up to 50 million cycles of strikes, no worry of the product lifespan. Specifications： •Product Dimensions: 132*86*42mm •Interface Type: USB2.0 •Product Weight: 264G±10G •Number of Keys: 21 keys with dual-colour keycap technology •Keystroke Life: 50 million cycles •Keyboard Type: High keycap step design •Operating Voltage: DC5V±5% •Use Maximum Current: 300MA •Connection Method: Wired •System Requirements: WINXP/WIN7/WIN8/WIN10/WIN11/MAC •Keyboard Combination Functions FN Key Combination Functions： FN+←key=Adjust the front lighting effects. FN+ * key = Switch random 7 colours or 7 single colours. FN+ ”8/2”key = 5 levels of speed adjustment. FN+”+/-”key= 5 levels of brightness adjustment. FN+ESC= Restore factory settings FN+”.”=Front light off/on backlight function FN+NUM= Calculator •Perimeter ring ambient lighting effect adjustment： FN+Tab，switch between the available light modes. FN+”/”key，8 independent colour adjustment FN+”0”key，stop or start adjustment for streaming light FN+”4/6”key，adjust the direction of the streamlight Package included: •1 x K3QMK Digital Keyboard •1 x Shaft Puller •1 x Type-C Charging Cable •1 x Box •1 x English and Chinese Product Manual