RetroCompass
RetroCompass

GameSir T4 Kaleid — Firmware update

Quick answer

Steps

  1. 1Install the GameSir T4k App on a Windows PC (Microsoft Store or gamesir.com).
  2. 2Connect the T4 Kaleid to the PC with the USB-C cable.
  3. 3Open the app, let it detect the controller, and apply any firmware update.
  4. 4Keep the cable connected until it finishes.
  5. 5Afterward, open GameSir Nexus on PC if you want to set the polling rate to 1000Hz.

LED states

  • flash twice—Connected to PC
  • solid—Operation complete
Last verified: 2026-06-20Source: gamesir.com

The wired T4 Kaleid updates through the GameSir T4k App on a Windows PC over USB-C. Open the app, let it find the controller, and apply the offered firmware without unplugging. Once updated, you can open GameSir Nexus on PC to raise the polling rate to 1000Hz. The LED strips flash green twice when the controller is connected in PC mode.

FAQ

Which app updates the T4 Kaleid?
The GameSir T4k App on PC handles firmware; GameSir Nexus is only used afterward to enable the 1000Hz polling rate.
Can I update it on a Switch?
No, run the firmware update from a Windows PC over USB-C, then connect to the Switch normally.

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