diff --git a/sw_usb_audio/app_usb_aud_fosi_c1/check_version.bat b/sw_usb_audio/app_usb_aud_fosi_c1/check_version.bat
new file mode 100644
index 0000000..b36d01f
--- /dev/null
+++ b/sw_usb_audio/app_usb_aud_fosi_c1/check_version.bat
@@ -0,0 +1,2 @@
+tools\dfu-util.exe -l
+pause
\ No newline at end of file
diff --git a/sw_usb_audio/app_usb_aud_fosi_c1/flash.bat b/sw_usb_audio/app_usb_aud_fosi_c1/flash_fact.bat
similarity index 100%
rename from sw_usb_audio/app_usb_aud_fosi_c1/flash.bat
rename to sw_usb_audio/app_usb_aud_fosi_c1/flash_fact.bat
diff --git a/sw_usb_audio/app_usb_aud_fosi_c1/flash_update.bat b/sw_usb_audio/app_usb_aud_fosi_c1/flash_update.bat
new file mode 100644
index 0000000..ac54b5f
--- /dev/null
+++ b/sw_usb_audio/app_usb_aud_fosi_c1/flash_update.bat
@@ -0,0 +1,3 @@
+tools\dfu-util.exe -l
+tools\dfu-util.exe -d 152a:809d -D %1 -R
+pause
\ No newline at end of file