How to Use: 1.Fn + ESC long press 3 seconds, the backlight flashes twice, reply to the default state, clear the recorded pattern simultaneously to the default status 2.FM + scroll switching light‑emitting mode, 14 mode loop switching can be achieved 3.Fn + print ‑‑‑ Backlight recording mode, press the Fn + PRSC button, enter the light recording mode, and the cm / cm2 / 0m3 / cm4 / 0m5 and three indicators are flashing, select the CM1‑CM5 in any group. Record the backlight pattern. The specific steps are as follows: a. Press Fn + Print, the full keyboard is extinguished, and the CM1 / CM2 / CM3 / CM4 / CM5 and three LED lights flash, enter the recording mode b. Select any button of the CM1‑CM5 (at this time, the three indicators is flashing), you can make a backlight pattern to the full keyboard, if the button is turned off, then light the button, and turn off button c. Press fn + print again to save the recorded light, and the backlight stays in the illuminating area mode. 4. Side light effect adjustment Fn + Del: circumstance light backlight effect cycle switching Specification: Item Type: Mechanical Gaming Keyboard Model: K750 Button Number: 104 Key Button Backlight: Color Mixing Button Shaft Durability: 5 Million Times Interface: USB2.0 Working Voltage: 5v ± 5% Work Current: <200mA Support System: For Windows XP / 7/8/10 System Package List: 1 x Mechanical Gaming Keyboard