diff --git a/homeassistant/components/webostv/__init__.py b/homeassistant/components/webostv/__init__.py
index 13f3d9e8f8d80d..9dec8fe0c71eb1 100644
--- a/homeassistant/components/webostv/__init__.py
+++ b/homeassistant/components/webostv/__init__.py
@@ -17,6 +17,8 @@
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 
+from .const import ATTR_SOUND_OUTPUT
+
 DOMAIN = "webostv"
 
 CONF_SOURCES = "sources"
@@ -30,6 +32,8 @@
 SERVICE_COMMAND = "command"
 ATTR_COMMAND = "command"
 
+SERVICE_SELECT_SOUND_OUTPUT = "select_sound_output"
+
 CUSTOMIZE_SCHEMA = vol.Schema(
     {vol.Optional(CONF_SOURCES, default=[]): vol.All(cv.ensure_list, [cv.string])}
 )
@@ -60,9 +64,15 @@
 
 COMMAND_SCHEMA = CALL_SCHEMA.extend({vol.Required(ATTR_COMMAND): cv.string})
 
+SOUND_OUTPUT_SCHEMA = CALL_SCHEMA.extend({vol.Required(ATTR_SOUND_OUTPUT): cv.string})
+
 SERVICE_TO_METHOD = {
     SERVICE_BUTTON: {"method": "async_button", "schema": BUTTON_SCHEMA},
     SERVICE_COMMAND: {"method": "async_command", "schema": COMMAND_SCHEMA},
+    SERVICE_SELECT_SOUND_OUTPUT: {
+        "method": "async_select_sound_output",
+        "schema": SOUND_OUTPUT_SCHEMA,
+    },
 }
 
 _LOGGER = logging.getLogger(__name__)
diff --git a/homeassistant/components/webostv/const.py b/homeassistant/components/webostv/const.py
new file mode 100644
index 00000000000000..a81696f6c0baed
--- /dev/null
+++ b/homeassistant/components/webostv/const.py
@@ -0,0 +1,4 @@
+"""Constants used for WebOS TV."""
+LIVE_TV_APP_ID = "com.webos.app.livetv"
+
+ATTR_SOUND_OUTPUT = "sound_output"
diff --git a/homeassistant/components/webostv/media_player.py b/homeassistant/components/webostv/media_player.py
index c34fb376d316ec..708db5ca679d2a 100644
--- a/homeassistant/components/webostv/media_player.py
+++ b/homeassistant/components/webostv/media_player.py
@@ -36,13 +36,11 @@
 from homeassistant.helpers.script import Script
 
 from . import CONF_ON_ACTION, CONF_SOURCES, DOMAIN
+from .const import ATTR_SOUND_OUTPUT, LIVE_TV_APP_ID
 
 _LOGGER = logging.getLogger(__name__)
 
 
-LIVETV_APP_ID = "com.webos.app.livetv"
-
-
 SUPPORT_WEBOSTV = (
     SUPPORT_TURN_OFF
     | SUPPORT_NEXT_TRACK
@@ -59,8 +57,6 @@
 MIN_TIME_BETWEEN_SCANS = timedelta(seconds=10)
 MIN_TIME_BETWEEN_FORCED_SCANS = timedelta(seconds=1)
 
-LIVE_TV_APP_ID = "com.webos.app.livetv"
-
 
 async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
     """Set up the LG WebOS TV platform."""
@@ -290,6 +286,14 @@ def supported_features(self):
             return SUPPORT_WEBOSTV | SUPPORT_TURN_ON
         return SUPPORT_WEBOSTV
 
+    @property
+    def device_state_attributes(self):
+        """Return device specific state attributes."""
+        attributes = {}
+        if self._client.sound_output is not None and self.state != STATE_OFF:
+            attributes[ATTR_SOUND_OUTPUT] = self._client.sound_output
+        return attributes
+
     @cmd
     async def async_turn_off(self):
         """Turn off media player."""
@@ -321,6 +325,11 @@ async def async_mute_volume(self, mute):
         """Send mute command."""
         await self._client.set_mute(mute)
 
+    @cmd
+    async def async_select_sound_output(self, sound_output):
+        """Select the sound output."""
+        await self._client.change_sound_output(sound_output)
+
     @cmd
     async def async_media_play_pause(self):
         """Simulate play pause media player."""
@@ -397,7 +406,7 @@ async def async_media_stop(self):
     async def async_media_next_track(self):
         """Send next track command."""
         current_input = self._client.get_input()
-        if current_input == LIVETV_APP_ID:
+        if current_input == LIVE_TV_APP_ID:
             await self._client.channel_up()
         else:
             await self._client.fast_forward()
@@ -406,7 +415,7 @@ async def async_media_next_track(self):
     async def async_media_previous_track(self):
         """Send the previous track command."""
         current_input = self._client.get_input()
-        if current_input == LIVETV_APP_ID:
+        if current_input == LIVE_TV_APP_ID:
             await self._client.channel_down()
         else:
             await self._client.rewind()
diff --git a/homeassistant/components/webostv/services.yaml b/homeassistant/components/webostv/services.yaml
index 137a6026eda648..1dfb3a6f1d3f22 100644
--- a/homeassistant/components/webostv/services.yaml
+++ b/homeassistant/components/webostv/services.yaml
@@ -24,3 +24,12 @@ command:
         https://github.com/TheRealLink/pylgtv/blob/master/pylgtv/endpoints.py
       example: 'media.controls/rewind'
 
+select_sound_output:
+  description: 'Send the TV the command to change sound output.'
+  fields:
+    entity_id:
+      description: Name(s) of the webostv entities to change sound output on.
+      example: 'media_player.living_room_tv'
+    sound_output:
+      description: Name of the sound output to switch to.
+      example: 'external_speaker'