diff --git a/.github/workflows/compile-examples-and-tools.yml b/.github/workflows/compile-examples-and-tools.yml
index 9a058c8..2711254 100644
--- a/.github/workflows/compile-examples-and-tools.yml
+++ b/.github/workflows/compile-examples-and-tools.yml
@@ -45,6 +45,8 @@ jobs:
             - source-url: https://github.com/matsujirushi/ntshell.git
             - name: Grove Ultrasonic Ranger
               version: 1.0.1
+            - name: AceButton
+              version: 1.10.1
           sketch-paths: |
             - examples
             - extras/tools
diff --git a/.github/workflows/create_prerelease.yml b/.github/workflows/create_prerelease.yml
index f9c6dbd..016315e 100644
--- a/.github/workflows/create_prerelease.yml
+++ b/.github/workflows/create_prerelease.yml
@@ -58,6 +58,8 @@ jobs:
           libraries: |
             - source-path: .
             - source-url: https://github.com/matsujirushi/ntshell.git
+            - name: AceButton
+              version: 1.10.1
           sketch-paths: |
             - ${{ matrix.sketch_path }}
           cli-compile-flags: |
diff --git a/extras/tools/inspection/inspection.ino b/extras/tools/inspection/inspection.ino
index 93623eb..96bfbc4 100644
--- a/extras/tools/inspection/inspection.ino
+++ b/extras/tools/inspection/inspection.ino
@@ -4,13 +4,22 @@
  * MIT License
  */
 
+////////////////////////////////////////////////////////////////////////////////
+// Libraries:
+//   http://librarymanager#AceButton 1.10.1
+
 #include <Adafruit_TinyUSB.h>
 #include <WioCellular.h>
+#include <AceButton.h>
+
+using namespace ace_button;
 
 static constexpr int POWER_ON_TIMEOUT = 20000;  // [ms]
 
 static const char* CELLULAR_REVISION = "BG770AGLAAR02A05_JP_01.200.01.200";
 
+static AceButton UserButton(PIN_BUTTON1);
+static bool UserButtonPressed = false;
 static int ErrorCount = 0;
 
 void setup(void) {
@@ -25,18 +34,21 @@ void setup(void) {
   Serial.println();
 
   Serial.println("Initialize");
+  auto config = UserButton.getButtonConfig();
+  config->setEventHandler(userButtonHandler);
+  config->setDebounceDelay(50);
   WioCellular.begin();
 
-  delay(1000);
   Serial.println("Wait for USER button");
-
+  UserButtonPressed = false;
   while (true) {
     if (millis() % 400 < 200)
       ledOn(LED_BUILTIN);
     else
       ledOff(LED_BUILTIN);
 
-    if (digitalRead(PIN_BUTTON1) == LOW) break;
+    UserButton.check();
+    if (UserButtonPressed) break;
 
     delay(2);
   }
@@ -46,12 +58,26 @@ void setup(void) {
   Serial.print("Enable Grove ... ");
   WioCellular.enableGrovePower();
   Serial.println("OK");
-  delay(5000);
+
+  Serial.println("Wait for USER button");
+  UserButtonPressed = false;
+  while (true) {
+    UserButton.check();
+    if (UserButtonPressed) break;
+    delay(2);
+  }
 
   Serial.print("Disable Grove ... ");
   WioCellular.disableGrovePower();
   Serial.println("OK");
-  delay(5000);
+
+  Serial.println("Wait for USER button");
+  UserButtonPressed = false;
+  while (true) {
+    UserButton.check();
+    if (UserButtonPressed) break;
+    delay(2);
+  }
 
   Serial.print("Power ON cellular ... ");
   {
@@ -99,3 +125,11 @@ void loop(void) {
   Serial.flush();
   suspendLoop();
 }
+
+static void userButtonHandler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
+  switch (eventType) {
+    case AceButton::kEventPressed:
+      UserButtonPressed = true;
+      break;
+  }
+}