How to Use: FN + ? The total brightness of the keyboard is adjusted, and the brightness is increased by 5 levels. The LED flashes when it is the brightest. FN + ? The total brightness of the keyboard is adjusted, the brightness of 5 levels decreases, and the LED flashes when it is the darkest. FN + ? Horse racing speed adjustment: speed up, when reaching the highest gear, the indicator LED flashes. FN + ? Horse racing speed adjustment: the speed slows down, and when the lowest gear is reached, the indicator LED flashes. FN + WIN-L locks the WIN and APP keys at the same time. Press to turn on the function, press again to return to normal Support the keyboard reset function by pressing FN + ESC at the same time and then pressing F1 + F3 + F5 in turn. 1.7. FN+WIN-L lock WIN function. Press FN+WIN-L at the same time to lock the WIN button, and then press to unlock. 1.8. Support three independent LED indications: Num lo/ck LED / Caps lock LED / Scr lock LED Specification: Item Type: Wired Keyboard Keycap: Two-Color Injection Keycap Type: LC Optical Axle Keyboard Light-emitting Mode: Multiple Light-Emitting Modes Diy Design: Support Working Voltage: 5V Package List: 1 x Wired Keyboard 1 x User ManualFULL NUMERIC KEYBOARD: Equipped with a full numeric keyboard and a gold-plated corrosion-resistant USB connector for reliable connection. 12 MULTIMEDIA BUTTONS: With 12 multimedia buttons, ergonomic non-slip and splash-proof design, can achieve the gaming performance. RGB BACKLIT KEYBOARD: The RGB Led keyboard is equipped with molded keycaps to provide glittering clear uniform backlight and non-scratch letters. FAST MECHANICAL BUTTONS: Fast mechanical buttons with medium resistance, precise actuation, audible clicks and tactile impact feedback. 104 KEYS MECHANICAL GAMING KEYBOARD: A 104-key keyboard with custom mechanical switches is designed to extend service life, improve durability and response speed.