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What Are Optical Keyboard Switches? Simply put, optical keyboard switches differ from typical mechanical switches in that they use light for actuation instead of a mechanical connection. Why Optical Switches? There are several reasons why optical switches portend to be superior to traditional mechanical switches, including speed, durability/ruggedness and the ability to expand the capabilities of the switch. Specification: Dimension: 18.1*6.1*1.18 inch Wrist Rest Size: 17.3*2.75 inch Weight: 1kg Number of keys: 104 keys Switch: Blue Switch Switch Lifespan: 80 million Voltage: 5V±5% Connection: USB Wired Cable length: 1.6m Convenient Multimedia Shortcuts: FN+F1: My Music FN+F2: Volume Decrease FN+F3: Volume Increase FN+F4: Mute FN+F5: Stop FN+F6: Previous FN+F7: Play/Pause FN+F8: Next FN+F9: Open E-mail FN+F10: Open Home Page FN+F11: My Computer FN+F12: Open Calculator Lighting Effects Shortcuts: FN+INSERT: Switching Lighting Effect (1-4) FN+DELETE: Switching Lighting Effect (5-8) FN+HOME: Switching Lighting Effect (9-12) FN+PGUP: Switching Lighting Effect (13-16) FN+PGDM: Switching Lighting Effect (17-20) FN+UP: Lighting Brightness Up, 5 Levels FN+DOWN: Lighting Brightness Down, 5 Levels FN+LEFT: Change the lighting effect direction to left FN+LIGHT: Change the lighting effect direction to right FN+-: Lighting Speed Down, 5 Levels FN+=: Lighting Speed Up, 5 Levels FN+WIN_L: Window Lock Key FN+ESC: Press FN+ESC, then press F1+F3+F5 to reset FN+PAUSE: Pause the lighting effect FN+PAINT: Switching the Sidelight Lighting Effect