diff --git a/doc/feature_list.md b/doc/feature_list.md
new file mode 100644
index 0000000..f509d1d
--- /dev/null
+++ b/doc/feature_list.md
@@ -0,0 +1,29 @@
+## Test set up
+source code and release package
+
+## boot.img
+
+## ota.zip
+platforms: macOS, Linux
+
+specify the partition to extract:
+"-Dpart=XXX"
+
+* jdk: java 11
+
+* wrapper script
+should be compatible with "/usr/bin/env sh"
+
+## dtbo
+
+[multiple dtb](https://source.android.com/docs/core/architecture/dto/multiple)
+
+## TODO: command line usage
+unpack
+```
+abe unpack boot.img
+```
+pack
+```
+abe pack
+```
diff --git a/lazybox/src/main/kotlin/cfig/lazybox/sysinfo/SysInfo.kt b/lazybox/src/main/kotlin/cfig/lazybox/sysinfo/SysInfo.kt
index 6b06be3..d776583 100644
--- a/lazybox/src/main/kotlin/cfig/lazybox/sysinfo/SysInfo.kt
+++ b/lazybox/src/main/kotlin/cfig/lazybox/sysinfo/SysInfo.kt
@@ -125,6 +125,15 @@ makeTar("%s", "%s")
             File("config.gz").deleteOnExit()
             File("config").deleteOnExit()
         }
+
+        FileOutputStream("$prefix/4_setting").use { fos ->
+            fos.write("[global]\n".toByteArray())
+            runAndWrite("adb shell settings list global", fos, false)
+            fos.write("\n[system]\n".toByteArray())
+            runAndWrite("adb shell settings list system", fos, false)
+            fos.write("\n[secure]\n".toByteArray())
+            runAndWrite("adb shell settings list secure", fos, false)
+        }
         "adb pull /proc/device-tree".check_call(prefix)
         Files.move(Paths.get("$prefix/device-tree"), Paths.get("$prefix/device_tree"))
 
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