108 Keys Anti-ghosting Profession Driver Keyboards Dual Mode For Pc Computer Gamer Wired Usb Keyboard Computer Accessories Description: Product parameters: Transmission mode: wired USB Number of keys: 108 Key stroke: 4.0mm Key strength: 6010g Key life times: about 50 million times Rated voltage/current: DC5V/250mA Product size: 435(L) 123(W) 38.5(H) 0.5mm Hand support size: 435 (l) 68 (w) 14.5 (h) 0.5mm System Requirements: Vista/Windows 7,8,10/Mac Specifications: Dual Mode 1.Knob dual mode design default lighting mode like "light effect mode "and "multimedia mode" 2.Operation modelong press for 3 seconds to switch the multimedia mode ,the knob light is off; the light effect mode, the knob light ison Multimedia modepress 1. Control the Volume By rotating the knob, you can adjust the volume of your headset or speaker, or press the button to make them mute 2.Rotate The Knob Up to Decrease the Volume /Rotate the Knob Down to increase the Volume 3.M1 for Last Song,M2 Play/Pause,M3 Next Song Light effect modespin 1. Switch The Lighting Effect Click the button to switch the light effect mode and store up to 19 lighting effects. 2. Adjust The Brightness By rotating the knob, you can adjust the brightness of the backlit or tum the lights off 3. Custom Your Lighting Effect Press M1 (or M2/ M3) firstly, then press and hold the M1 (or M2/ M3) button until the knob indicator flashes and the lights of the keys are off, you can custom your lighting effect by pressing the keys that you want, then press the M1 (or M2/ M3) to confirm Package Included: 1 * wired mechanical keyboard, 1 * hand support, 1 * instruction manual