diff --git a/homeassistant/components/blebox/button.py b/homeassistant/components/blebox/button.py
index 16ab7b4493d715..e82216c8f0f434 100644
--- a/homeassistant/components/blebox/button.py
+++ b/homeassistant/components/blebox/button.py
@@ -21,6 +21,9 @@
     "fav": ButtonEntityDescription(key="fav", translation_key="fav"),
     "open": ButtonEntityDescription(key="open", translation_key="open"),
     "close": ButtonEntityDescription(key="close", translation_key="close"),
+    "second_output": ButtonEntityDescription(
+        key="second_output", translation_key="second_output"
+    ),
 }
 
 _DEFAULT_BUTTON = ButtonEntityDescription(key="button")
diff --git a/homeassistant/components/blebox/strings.json b/homeassistant/components/blebox/strings.json
index 82f9cb4944f6a8..70c49a6f98b200 100644
--- a/homeassistant/components/blebox/strings.json
+++ b/homeassistant/components/blebox/strings.json
@@ -78,6 +78,7 @@
       "down": { "name": "Down" },
       "fav": { "name": "Favorite" },
       "open": { "name": "Open" },
+      "second_output": { "name": "Second output" },
       "up": { "name": "Up" }
     },
     "light": { "channel": { "name": "Channel {index}" } },
diff --git a/tests/components/blebox/test_button.py b/tests/components/blebox/test_button.py
index 1ec63623141bc6..1a18de458b1679 100644
--- a/tests/components/blebox/test_button.py
+++ b/tests/components/blebox/test_button.py
@@ -1,7 +1,7 @@
 """Blebox button entities tests."""
 
 import logging
-from unittest.mock import PropertyMock
+from unittest.mock import Mock, PropertyMock
 
 import blebox_uniapi
 import pytest
@@ -56,6 +56,44 @@ async def test_tvliftbox_init(
     assert state.name == "My tvLiftBox"
 
 
+@pytest.fixture(name="gatebox_second_output")
+def gatebox_second_output_fixture(caplog: pytest.LogCaptureFixture):
+    """Return a gateBox second output button entity mock."""
+    caplog.set_level(logging.ERROR)
+
+    feature = mock_feature(
+        "buttons",
+        blebox_uniapi.button.Button,
+        unique_id="BleBox-gateBox-1afe34d27e4f-second_output",
+        full_name="gateBox-second_output",
+        query_string="second_output",
+    )
+
+    product = feature.product
+    type(product).name = PropertyMock(return_value="My gateBox")
+    type(product).type = PropertyMock(return_value="gateBox")
+    type(product).model = PropertyMock(return_value="gateBox")
+
+    return (feature, "button.my_gatebox_second_output")
+
+
+async def test_gatebox_second_output_init(
+    hass: HomeAssistant,
+    gatebox_second_output: tuple[Mock, str],
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test gateBox second output button initialisation."""
+    caplog.set_level(logging.ERROR)
+
+    _, entity_id = gatebox_second_output
+    entry = await async_setup_entity(hass, entity_id)
+    state = hass.states.get(entity_id)
+
+    assert entry.unique_id == "BleBox-gateBox-1afe34d27e4f-second_output"
+    assert entry.translation_key == "second_output"
+    assert state.name == "My gateBox Second output"
+
+
 @pytest.mark.parametrize(
     ("query_string", "expected_translation_key", "expected_entity_id", "expected_name"),
     query_translation_key_matching,