Specification: Item Type: Mechanical Gaming Keyboard Model: K550 Button Shaft: Mechanical Green Shaft Button Number: 104 Key Button Backlight: Color Mixing Button Shaft Durability: 5 Million Times Interface: USB2.0 Working Voltage: 5V ± 0.25V Work Current: 150mA Support System: For Windows XP / 7/8/10 System Package List: 1 x Mechanical Gaming Keyboard How to Use: FN combination function introduction: Fn + f1 = multimedia Fn + F2 = volume reduction fn + f3 = volume increase f4 = mute Fn + f5 = Stop fn + f6 = Play up one Fn + F7 = play / pause Fn + F8 = Play down FN + F9 = mail Fn + F10 = Home Fn + F11 = My computer fn + f12 = calculation Be aware of Fn + ? = LED Speed Deceleration Fn + ? = LED Speed Acceleration FN + ? = Reduce Brightness Fn + ? = Increase Brightness Fn + Win = Lock WN Keys Fn + W = W, A, S, D and Direction Keys Switching Backlight function adjustment description: Fn + INS: nine models

PROFESSIONAL GAMIG KEYBOARD:Built-in powerful game chip, accurate and quickly handle each data, calibrate all kinds of intense competitive battles. SUSPENSION KEY CAPS:Suspension key caps double-sided injection transmissive suspended suite caps, double-sided injection molding, wear-resistant does not fade every time with keycaps. MECHANICAL GREEN SHAFT:Mechanical green shaft dust side wing real mechanical green shaft, help lasting game, shaft with dust-proof side, up to 50 million button life. ERGONOMIC KEYBOARD:Human engineering radians High human engineering ladder key caps design, up and down ramp touch improved corners, customized mechanical shaft. BACKLIT KEYBOARD:Color mixed button backlight, a variety of lamp effects, accuracy polishing round chamfering process is not easy to fall off and wear-resistant, non-corrosion.