diff --git a/package-lock.json b/package-lock.json
index 6baf2a25..94ab9aef 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -481,7 +481,7 @@
     },
     "node_modules/@openmouse/protocol": {
       "version": "0.1.0",
-      "resolved": "git+ssh://git@github.com/OpenMouse-Project/mouse-protocol.git#9d85a0ed416b6b1a2013c80e6a5c4c1ab9b71e02",
+      "resolved": "git+ssh://git@github.com/OpenMouse-Project/mouse-protocol.git#badc8d35b00af881f6ebf9e9a812ffd903b97b76",
       "engines": {
         "node": ">=20"
       }
diff --git a/src/device/controller.ts b/src/device/controller.ts
index b83a179e..af8f51f5 100644
--- a/src/device/controller.ts
+++ b/src/device/controller.ts
@@ -145,6 +145,7 @@ import {
 } from "@openmouse/protocol/keychron";
 import { SUPPORTED_HID_FILTERS } from "@openmouse/protocol/drivers/vendors";
 import { WLMouseHidClient } from "@openmouse/protocol/drivers/wlmouse/hid";
+import { MicrosoftHidClient } from "@openmouse/protocol/drivers/microsoft/hid";
 import { parsePreviewMode, previewsEnabled, type PreviewMode } from "../preview-modes";
 import { sleepLabel } from "./options";
 import { traitsFor } from "./traits";
@@ -196,7 +197,7 @@ function activeAs<T>(...classes: ClientClass<T>[]): T | null {
 
 const DM_CLASSES = [WLMouseHidClient, LamzuHidClient, AtkHidClient, AtkBitmouseHidClient, NinjutsoHidClient] as const;
 const RAZER_CLASSES = [RazerHidClient, RazerViperMiniHidClient, RazerViperHidClient, RazerCobraHidClient] as const;
-const NEEDS_OPEN = [TeevolutionHidClient, VgnF2HidClient, KeychronNapeHidClient, KeychronM6HidClient, ModdoHidClient, ZaunkoenigHidClient, FantechHidClient, WallhackMouseHidClient, WallhackKeyboardHidClient, GloriousHidClient, GloriousClassicHidClient, MchoseHidClient, MchoseDockHidClient] as const;
+const NEEDS_OPEN = [TeevolutionHidClient, VgnF2HidClient, KeychronNapeHidClient, KeychronM6HidClient, ModdoHidClient, ZaunkoenigHidClient, FantechHidClient, WallhackMouseHidClient, WallhackKeyboardHidClient, GloriousHidClient, GloriousClassicHidClient, MchoseHidClient, MchoseDockHidClient, MicrosoftHidClient] as const;
 const PULSAR_CLASSES = [PulsarHidClient, PulsarProHidClient, PulsarXs1HidClient] as const;
 
 const logitechClient = (): LogitechHidppClient | null => activeAs(LogitechHidppClient);
diff --git a/src/supported-mice.test.ts b/src/supported-mice.test.ts
index 934bd229..ed166761 100644
--- a/src/supported-mice.test.ts
+++ b/src/supported-mice.test.ts
@@ -8,6 +8,7 @@ import { BITMOUSE_PRODUCT_IDS } from "@openmouse/protocol/bitmouse";
 import { EGG_DEVICE_PROFILES } from "@openmouse/protocol/endgame-gear-op1";
 import { KEYCHRON_NAPE_PRODUCTS } from "@openmouse/protocol/keychron";
 import { LAMZU_PRODUCTS } from "@openmouse/protocol/lamzu";
+import { MICROSOFT_PRODUCTS } from "@openmouse/protocol/microsoft";
 import {
   LOGITECH_BOLT_PRODUCT_IDS,
   LOGITECH_DIRECT_PRODUCT_IDS,
@@ -151,6 +152,7 @@ const PID_UNIVERSE = new Set<number>([
   MCHOSE_DOCK_PRODUCT_ID,
   ...GLORIOUS_PRODUCTS.keys(),
   ...GLORIOUS_CLASSIC_PRODUCTS.keys(),
+  ...MICROSOFT_PRODUCTS,
 ]);
 test("every pinned PID on a coverage claim exists in the protocol registry", () => {
   const withPids: Array<Mouse & { pids: readonly number[] }> = MICE.filter(
diff --git a/src/supported-mice.ts b/src/supported-mice.ts
index ea6b0863..3364c69a 100644
--- a/src/supported-mice.ts
+++ b/src/supported-mice.ts
@@ -527,6 +527,14 @@ export const MICE: Mouse[] = [
     pids: [0x080c],
     note: "PID 0x080c in Orbital driver" },
 
+  // MICROSOFT ───────────────────────────────────────────────────────────
+  { brand: "Microsoft", model: "Pro Intellimouse",      status: "supported", req: 0,
+    pids: [0x082a],
+    note: "For LOD, Low is 2mm, High is 3mm. Calibrated surface 1/2/3 is not supported yet." },
+  { brand: "Microsoft", model: "Classic Intellimouse",  status: "supported", req: 0,
+    pids: [0x0823],
+    note: "DPI, polling rate, LOD and RGB color are supported." },
+
   // KEYCHRON ────────────────────────────────────────────────────────────
   { brand: "Keychron", model: "Nape Pro",               status: "supported", req: 1,
     pids: [0x0440],
diff --git a/src/ui/device-images.ts b/src/ui/device-images.ts
index 70c27f3a..f5434ab8 100644
--- a/src/ui/device-images.ts
+++ b/src/ui/device-images.ts
@@ -145,6 +145,9 @@ const DEVICE_IMAGES: ReadonlyMap<string, string> = new Map([
   // K-snake X11 wired / 2.4 GHz dongle share the same shell.
   ["a8a4:2255", "ksnake-x11.png"],
   ["a8a5:2255", "ksnake-x11.png"],
+  // Microsoft Intellimouse
+  ["045e:0823", "microsoft-classic-intellimouse.png"],
+  ["045e:082a", "microsoft-pro-intellimouse.png"],
 ]);
 
 function deviceKey(device: HIDDevice): string {
@@ -221,6 +224,9 @@ function resolveDeviceImageFilename(device: HIDDevice | null | undefined, displa
   if (/\b(finalmouse|starlight|ulx)\b/i.test(displayName)) return "finalmouse-ulx.png";
   if (/\borbital\b/i.test(displayName)) return "unknown-device.png";
   if (/\bmoddo/i.test(displayName)) return "unknown-device.png";
+  if (/\bintellimouse\s*classic\b/i.test(displayName)) return "microsoft-classic-intellimouse.png";
+  if (/\bpro\s*intellimouse\b/i.test(displayName)) return "microsoft-pro-intellimouse.png";
+  if (/\bintellimouse\b/i.test(displayName)) return "microsoft-classic-intellimouse.png";
   // Pulsar 4K Wireless Receiver ships with the X2 V2 4K dongle kit; the receiver
   // product id is not yet published, so match the name reported by WebHID.
   if (/pulsar/i.test(displayName)) return "pulsar-x2-v2.png";