The Corsair K70 has many extra features. It has a button to control the backlight’s brightness, a Windows lock button, and dedicated media controls, which include a volume wheel. You can reassign or set a macro to any key; however, it can only be done through software. There’s a USB passthrough and next to it, is a physical switch with five options. The numbers 1, 2, 4, and 5 are polling rate settings, and we recommend using ‘1’, which is the highest polling rate at 1000Hz. The fifth option is the BIOS setting, which is used to resolve compatibility issues with some computers’ BIOS and with KVM switches.