Keyboard Gaming Multimedia Mechanical AULA F2088 - Black Switch *Product Description : - Dual Mode Knob Design - You Can store desired light effect with 3 different keys - Multimedia hot-key design - Double injection key caps - Designed with mechanical switches for durability and excellent hand feel - The hand rest uses ultrasonic welding technology, and the magnetic design is perfectly matched with the keyboard - This keyboard wil turn off the backlight when change to the sleep mode *Product Features : - Knob dual mode design, default lightng mode, like 'light effect mode' and 'multimedia mode' - Operation method : Hold for 3 seconds to switch between multimedia mode and light effect mode - FN+ESC : hold these two key for 1~2 seconds to restore factory defaults *Multimedia mode : - In multimedia mode : Knob light is off to multimedia mode. Click the button to mute the function. - In the multimedia mode : Rotate the knob antoclockwise to decrease volume. Rotate the knob clockwise to increase volume. *Light effect mode : 1. In the light effect mode : - The rotation indicator lights up to the lighting mode. - Click the button to witch the light effect mode and store up to 19 lighting effects. 2. In the light effect mode : - Rotate the knob anticlockwise to decrease the brightness of the light - Rotate the knob clockwise to increase the brightness of the light *Specifications : - Connectivity : Wired USB - Number of buttons : 108 - Button Stroke : 4.0mm - Button Strength : 60 +- 10g - Button life times : 50 million - Rated current and voltage : DC5V / 250mA - Product Size : 435(L) x 123(W) x 36(H) +- 0.5mm - Hand tray size : 435(L) x 68(W) x 14.5(H) +- 0.5mm - Product weight : 0.83KG +- 10g - System requirement : Vista / Windows 7, 8, 10 / Mac