For sale: Corsair keyboard, the fastest mechanical keyboard in the world, uses light technology (optical) for response, which is why its speed is close to touch, OPX. Corsair K70 RGB TKL Champion Series Tenkeyless Optical-Mechanical Gaming Keyboard (OPX RGB Optical-Mechanical Keyswitches) I've used the keyboard for exactly one year, bought in June 2025. The keyboard is slim. The only defect is the volume knob, which is not precise sometimes. If you raise the volume, it lowers it by one degree and then raises it, same as most volume knobs on keyboards. Its new price is 650. For sale for 300. If you are in Khamis Mushait or Abha, hand delivery. If outside, shipping is 20 via Redbox.