diff --git a/.gitignore b/.gitignore
index ac35511..6010f9c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .venv/
+.venv-build/
 .venv-build-win/
 __pycache__/
 *.py[cod]
@@ -10,7 +11,8 @@ build/
 analysis/
 *.zip
 *.tar.gz
-# keep vendor/libusb-1.0.dll in repo for Windows bundling
-!vendor/libusb-1.0.dll
-.venv-build/
 hub.log
+# keep vendor binaries
+!vendor/libusb-1.0.dll
+!vendor/wheels/
+!vendor/wheels/*.whl
diff --git a/README.md b/README.md
index fba98d0..3a097ea 100644
--- a/README.md
+++ b/README.md
@@ -59,10 +59,14 @@ python -m juc500_xfer info
 cd juc500
 py -3 -m venv .venv
 .\.venv\Scripts\Activate.ps1
-pip install -r requirements.txt
+# vendor\wheels\pyusb-*.whl 사용 (PyPI 불필요)
+python -m pip install --no-index --find-links=vendor\wheels -r requirements.txt
+pip install -e .
 python -m juc500_xfer info
 ```
 
+또는 `scripts\setup_windows.bat` 실행.
+
 ## 사용법
 
 양쪽 PC에 케이블을 꽂고, **먼저 수신 쪽**, 이어서 송신 쪽을 실행합니다.
diff --git a/docs/WINDOWS.md b/docs/WINDOWS.md
index d6f7a71..4175d53 100644
--- a/docs/WINDOWS.md
+++ b/docs/WINDOWS.md
@@ -1,5 +1,20 @@
 # Windows 11 설정
 
+## 소스에서 실행 (오프라인 wheel 포함)
+
+저장소의 `vendor/wheels/pyusb-1.2.1-py3-none-any.whl` 을 사용합니다. PyPI 접속이 없어도 됩니다.
+
+```powershell
+cd juc500
+py -3 -m venv .venv
+.\.venv\Scripts\Activate.ps1
+python -m pip install --no-index --find-links=vendor\wheels -r requirements.txt
+pip install -e .
+python -m juc500_xfer gui
+```
+
+또는 `scripts\setup_windows.bat`
+
 ## 설치파일 사용 (권장)
 
 1. `JUC500-Setup-win64.exe` 실행해 설치  
diff --git a/pyproject.toml b/pyproject.toml
index 031f56d..05d09c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ version = "0.1.0"
 description = "Apple Silicon Mac ↔ Windows 11 file transfer over j5create JUC500"
 readme = "README.md"
 requires-python = ">=3.10"
-dependencies = ["pyusb>=1.2.1"]
+dependencies = ["pyusb==1.2.1"]
 
 [project.scripts]
 juc500 = "juc500_xfer.cli:main"
diff --git a/requirements.txt b/requirements.txt
index 65e783e..b059f90 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,4 @@
-pyusb>=1.2.1
+# vendor/wheels 의 pyusb wheel을 우선 사용합니다.
+# 오프라인: pip install --no-index --find-links=vendor/wheels -r requirements.txt
+--find-links=vendor/wheels
+pyusb==1.2.1
diff --git a/scripts/setup_macos.sh b/scripts/setup_macos.sh
index 589b2ab..285a150 100755
--- a/scripts/setup_macos.sh
+++ b/scripts/setup_macos.sh
@@ -14,12 +14,15 @@ python3 -m venv .venv
 # shellcheck disable=SC1091
 source .venv/bin/activate
 pip install -U pip
-pip install -r requirements.txt
+# vendor wheel 우선 (오프라인 가능)
+pip install --no-index --find-links=vendor/wheels -r requirements.txt \
+  || pip install --find-links=vendor/wheels -r requirements.txt
 pip install -e .
 
 echo
 echo "설치 완료. 예:"
 echo "  source $ROOT/.venv/bin/activate"
 echo "  juc500 info"
+echo "  juc500 gui"
 echo "  juc500 recv -y --dest ~/Downloads"
 echo "  juc500 send /path/to/file"
diff --git a/scripts/setup_windows.bat b/scripts/setup_windows.bat
index 67bda90..2602f34 100644
--- a/scripts/setup_windows.bat
+++ b/scripts/setup_windows.bat
@@ -5,12 +5,21 @@ cd /d %~dp0..
 py -3 -m venv .venv
 call .venv\Scripts\activate.bat
 python -m pip install -U pip
-pip install -r requirements.txt
-pip install -e .
+REM PyPI 없이 vendor\wheels 의 pyusb wheel 사용
+python -m pip install --no-index --find-links=vendor\wheels -r requirements.txt
+if errorlevel 1 (
+  echo [!] --no-index 실패. find-links + 온라인 허용으로 재시도…
+  python -m pip install --find-links=vendor\wheels -r requirements.txt
+)
+python -m pip install --no-index --find-links=vendor\wheels -e .
+if errorlevel 1 (
+  python -m pip install --find-links=vendor\wheels -e .
+)
 
 echo.
 echo Setup done. Next:
 echo   .venv\Scripts\activate
 echo   python -m juc500_xfer info
+echo   python -m juc500_xfer gui
 echo See docs\WINDOWS.md for Zadig / WinUSB steps.
 endlocal
diff --git a/vendor/wheels/README.md b/vendor/wheels/README.md
new file mode 100644
index 0000000..7212526
--- /dev/null
+++ b/vendor/wheels/README.md
@@ -0,0 +1,7 @@
+# Place offline Python wheels here for Windows/macOS installs without PyPI.
+# Currently vendor'd:
+#   pyusb-1.2.1-py3-none-any.whl
+#   pyusb-1.3.1-py3-none-any.whl
+#
+# Install:
+#   pip install --no-index --find-links=vendor/wheels -r requirements.txt
diff --git a/vendor/wheels/pyusb-1.2.1-py3-none-any.whl b/vendor/wheels/pyusb-1.2.1-py3-none-any.whl
new file mode 100644
index 0000000..fc9a0ea
Binary files /dev/null and b/vendor/wheels/pyusb-1.2.1-py3-none-any.whl differ
diff --git a/vendor/wheels/pyusb-1.3.1-py3-none-any.whl b/vendor/wheels/pyusb-1.3.1-py3-none-any.whl
new file mode 100644
index 0000000..89fa172
Binary files /dev/null and b/vendor/wheels/pyusb-1.3.1-py3-none-any.whl differ