# Hardware & Peripheral Testing

> Verify your mouse, keyboard, gamepad, and monitor are performing as expected with free browser tools that test hardware locally without any drivers.

## Tools in this collection

- [滑鼠加速偵測器](https://www.teafun.cyou/tools/mouseaccel/) — 檢測您的作業系統是否啟用了滑鼠加速。先慢後快地移動滑鼠，我們將分析游標的非線性程度。
- [滑鼠靈敏度轉換器](https://www.teafun.cyou/tools/sensitivity/) — 即時轉換 50+ 款遊戲的滑鼠靈敏度。輸入您的 DPI 和靈敏度，查看 cm/360° 及各遊戲對應設定。
- [控制器測試器](https://www.teafun.cyou/tools/gamepad/) — 測試控制器輸入、檢查搖桿飄移，並自訂死區範圍。完全在瀏覽器中執行。
- [鍵盤熱力圖](https://www.teafun.cyou/tools/keyboard-heatmap/) — 即時追蹤最常用的按鍵，以真實打字頻率生成熱力圖，也可以匯出 PNG。
- [螢幕刷新率](https://www.teafun.cyou/tools/monitor/) — 在瀏覽器中偵測你的螢幕刷新率。

## FAQ

### Do I need to install drivers or software?

No. All tools run directly in your browser using standard web APIs. No downloads, extensions, or admin rights are required.

### Can these tools replace manufacturer software?

For quick diagnostics and verification they work well. For advanced configuration like custom DPI curves or RGB lighting you still need the manufacturer app.

### My controller shows movement when I am not touching it — what does that mean?

That is stick drift: the analog stick reports input at rest, usually from wear or dust. The gamepad tester confirms it and shows how severe it is, which helps you decide between cleaning, recalibrating, or replacing the controller.

### The monitor test shows a lower rate than my display is rated for — why?

A capped refresh rate usually comes from the cable, the OS display settings, or a graphics-driver default rather than the panel itself. Check that you are using a cable rated for the refresh rate and that the rate is selected in your system display settings.