diff --git a/client/src/lib/luxsinApi.ts b/client/src/lib/luxsinApi.ts
index 103851a..d003fab 100644
--- a/client/src/lib/luxsinApi.ts
+++ b/client/src/lib/luxsinApi.ts
@@ -101,6 +101,8 @@ export interface DeviceState {
   dreMode: number;
   dacVolumeDirect: number;
   analogGain: number;
+  /** USB Audio Class version: 0 = UAC 2.0, 1 = UAC 1.0. */
+  uac_ver: number;
   effect_enable: number;
   effect_value: number;
   width_enable: number;
@@ -488,6 +490,7 @@ export const MOCK_DEVICE_STATE: DeviceState = {
   dreMode: 0,
   dacVolumeDirect: 0,
   analogGain: 0,
+  uac_ver: 0,
   effect_enable: 0,
   effect_value: 50,
   width_enable: 0,
diff --git a/client/src/locales/data-de.json b/client/src/locales/data-de.json
index 10ef00c..6f4868b 100644
--- a/client/src/locales/data-de.json
+++ b/client/src/locales/data-de.json
@@ -168,7 +168,8 @@
       "options": [
         "BS2B Standard (700 Hz, 4,5 dB)",
         "BS2B Populär (700 Hz, 6 dB)",
-        "BS2B Entspannt (650 Hz, 9,5 dB)"
+        "BS2B Entspannt (650 Hz, 9,5 dB)",
+        "Custom"
       ]
     },
     "subwoofer": {
@@ -588,6 +589,19 @@
         }
       ]
     },
+    "uacVer": {
+      "label": "UAC-Version",
+      "options": [
+        {
+          "index": 0,
+          "label": "UAC 2.0"
+        },
+        {
+          "index": 1,
+          "label": "UAC 1.0"
+        }
+      ]
+    },
     "arc": {
       "label": "ARC-Modus",
       "options": [
diff --git a/client/src/locales/data-en.json b/client/src/locales/data-en.json
index 1a85673..f050cce 100644
--- a/client/src/locales/data-en.json
+++ b/client/src/locales/data-en.json
@@ -168,7 +168,8 @@
       "options": [
         "BS2B default (700 Hz, 4.5 dB)",
         "BS2B popular (700 Hz, 6 dB)",
-        "BS2B relax (650 Hz, 9.5 dB)"
+        "BS2B relax (650 Hz, 9.5 dB)",
+        "Custom"
       ]
     },
     "subwoofer": {
@@ -588,6 +589,19 @@
         }
       ]
     },
+    "uacVer": {
+      "label": "UAC Version",
+      "options": [
+        {
+          "index": 0,
+          "label": "UAC 2.0"
+        },
+        {
+          "index": 1,
+          "label": "UAC 1.0"
+        }
+      ]
+    },
     "arc": {
       "label": "ARC mode",
       "options": [
diff --git a/client/src/locales/data-es.json b/client/src/locales/data-es.json
index 2bf6ec3..f17b365 100644
--- a/client/src/locales/data-es.json
+++ b/client/src/locales/data-es.json
@@ -168,7 +168,8 @@
       "options": [
         "BS2B predeterminado (700 Hz, 4,5 dB)",
         "BS2B popular (700 Hz, 6 dB)",
-        "BS2B relajado (650 Hz, 9,5 dB)"
+        "BS2B relajado (650 Hz, 9,5 dB)",
+        "Custom"
       ]
     },
     "subwoofer": {
@@ -588,6 +589,19 @@
         }
       ]
     },
+    "uacVer": {
+      "label": "Versión UAC",
+      "options": [
+        {
+          "index": 0,
+          "label": "UAC 2.0"
+        },
+        {
+          "index": 1,
+          "label": "UAC 1.0"
+        }
+      ]
+    },
     "arc": {
       "label": "Modo ARC",
       "options": [
diff --git a/client/src/locales/data-fr.json b/client/src/locales/data-fr.json
index 088cccc..40dd47f 100644
--- a/client/src/locales/data-fr.json
+++ b/client/src/locales/data-fr.json
@@ -168,7 +168,8 @@
       "options": [
         "BS2B défaut (700 Hz, 4,5 dB)",
         "BS2B populaire (700 Hz, 6 dB)",
-        "BS2B relax (650 Hz, 9,5 dB)"
+        "BS2B relax (650 Hz, 9,5 dB)",
+        "Custom"
       ]
     },
     "subwoofer": {
@@ -588,6 +589,19 @@
         }
       ]
     },
+    "uacVer": {
+      "label": "Version UAC",
+      "options": [
+        {
+          "index": 0,
+          "label": "UAC 2.0"
+        },
+        {
+          "index": 1,
+          "label": "UAC 1.0"
+        }
+      ]
+    },
     "arc": {
       "label": "Mode ARC",
       "options": [
diff --git a/client/src/locales/data-zh-HK.json b/client/src/locales/data-zh-HK.json
index 92c8ca7..3f26afe 100644
--- a/client/src/locales/data-zh-HK.json
+++ b/client/src/locales/data-zh-HK.json
@@ -168,7 +168,8 @@
       "options": [
         "BS2B default(700Hz,4.5dB)",
         "BS2B polular(700Hz,6dB)",
-        "BS2B relax(650Hz,9.5dB)"
+        "BS2B relax(650Hz,9.5dB)",
+        "Custom"
       ]
     },
     "subwoofer": {
@@ -588,6 +589,19 @@
         }
       ]
     },
+    "uacVer": {
+      "label": "UAC版本",
+      "options": [
+        {
+          "index": 0,
+          "label": "UAC 2.0"
+        },
+        {
+          "index": 1,
+          "label": "UAC 1.0"
+        }
+      ]
+    },
     "arc": {
       "label": "ARC模式",
       "options": [
diff --git a/client/src/locales/data-zh.json b/client/src/locales/data-zh.json
index 5e52baf..2b1491e 100644
--- a/client/src/locales/data-zh.json
+++ b/client/src/locales/data-zh.json
@@ -168,7 +168,8 @@
       "options": [
         "BS2B default(700Hz,4.5dB)",
         "BS2B polular(700Hz,6dB)",
-        "BS2B relax(650Hz,9.5dB)"
+        "BS2B relax(650Hz,9.5dB)",
+        "Custom"
       ]
     },
     "subwoofer": {
@@ -588,6 +589,19 @@
         }
       ]
     },
+    "uacVer": {
+      "label": "UAC版本",
+      "options": [
+        {
+          "index": 0,
+          "label": "UAC 2.0"
+        },
+        {
+          "index": 1,
+          "label": "UAC 1.0"
+        }
+      ]
+    },
     "arc": {
       "label": "ARC模式",
       "options": [
diff --git a/client/src/pages/AudioPage.tsx b/client/src/pages/AudioPage.tsx
index 954fa65..774eae2 100644
--- a/client/src/pages/AudioPage.tsx
+++ b/client/src/pages/AudioPage.tsx
@@ -119,6 +119,7 @@ type LocaleDac = {
     autoImpedance?: { label?: string; options?: Array<{ index: number; label: string }> };
     dreMode?: { label?: string; options?: Array<{ index: number; label: string }> };
     dacVolumeDirect?: { label?: string; options?: Array<{ index: number; label: string }> };
+    uacVer?: { label?: string; options?: Array<{ index: number; label: string }> };
     volumeStep?: string;
     bootVolume?: string | { label?: string; options?: Array<{ index: number; label: string }> };
     xlr?: { label?: string; options?: Array<{ index: number; label: string }> };
@@ -222,6 +223,7 @@ export default function AudioPage() {
   const xlrIdx = ds?.xlr ?? 0;
   const mutePolarIdx = (ds as ({ hdmimutepolar?: number } | null))?.hdmimutepolar ?? 0;
   const iisModeIdx = (ds as ({ hdmiType?: number } | null))?.hdmiType ?? 0;
+  const uacVerIdx = Math.min(Math.max(ds?.uac_ver ?? 0, 0), 1);
   const bootSoundVal = normalizeBootSound(localBootSound);
   const firmwareVersion = parseFirmwareVersion(ds?.version);
   const bootSoundMaxIdx = getBootSoundMaxIndex(firmwareVersion);
@@ -238,6 +240,7 @@ export default function AudioPage() {
     "0dB",
     "-12dB",
   ]);
+  const UAC_VER_OPTIONS = optionLabels(dacText.uacVer?.options, ["UAC 2.0", "UAC 1.0"]);
 
   const pageTitle = usePageTitleWithConnection(localeData.home?.audioSet ?? "Audio");
 
@@ -388,6 +391,11 @@ export default function AudioPage() {
             value={XLR_OPTIONS[xlrIdx] ?? XLR_OPTIONS[0] ?? "—"}
             onClick={() => goSelect(dacText.xlr?.label ?? "选择 XLR 极性", XLR_OPTIONS, xlrIdx, "xlr")}
           />
+          <ListRow
+            label={dacText.uacVer?.label ?? "UAC 版本"}
+            value={UAC_VER_OPTIONS[uacVerIdx] ?? UAC_VER_OPTIONS[0] ?? "—"}
+            onClick={() => goSelect(dacText.uacVer?.label ?? "选择 UAC 版本", UAC_VER_OPTIONS, uacVerIdx, "uacVer")}
+          />
         </div>
       </div>
 
diff --git a/client/src/pages/SelectPage.tsx b/client/src/pages/SelectPage.tsx
index 03410dc..fc7f49b 100644
--- a/client/src/pages/SelectPage.tsx
+++ b/client/src/pages/SelectPage.tsx
@@ -52,6 +52,7 @@ const KEY_TO_SETTING: Record<string, string> = {
   dacGain: "dacGain",
   dacImpedance: "dacImpedance",
   dacVolumeDirect: "dacVolumeDirect",
+  uacVer: "uac_ver",
   vu: "vu",
   input: "input",
   output: "output",