diff --git a/ereuse_devicehub/migrations/versions/e93aec8fc41f_added_assigned_action.py b/ereuse_devicehub/migrations/versions/e93aec8fc41f_added_assigned_action.py
index 85aecb55..48a74602 100644
--- a/ereuse_devicehub/migrations/versions/e93aec8fc41f_added_assigned_action.py
+++ b/ereuse_devicehub/migrations/versions/e93aec8fc41f_added_assigned_action.py
@@ -60,8 +60,6 @@ def upgrade():
     op.drop_table('live', schema=f'{get_inv()}')
     op.create_table('live',
         sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
-        sa.Column('final_user_code', citext.CIText(), default='', nullable=True,
-            comment = "This is a internal code for mainteing the secrets of the personal datas of the new holder"),
         sa.Column('serial_number', sa.Unicode(), nullable=True,
                   comment='The serial number of the Hard Disk in lower case.'),
         sa.Column('time', sa.SmallInteger(), nullable=True),
diff --git a/ereuse_devicehub/resources/action/models.py b/ereuse_devicehub/resources/action/models.py
index 3436993d..c48cfd5c 100644
--- a/ereuse_devicehub/resources/action/models.py
+++ b/ereuse_devicehub/resources/action/models.py
@@ -1299,13 +1299,39 @@ class Live(JoinedWithOneDeviceMixin, ActionWithOneDevice):
     information about its state (in the form of a ``Snapshot`` action)
     and usage statistics.
     """
-    final_user_code = Column(CIText(), default='', nullable=True)
-    final_user_code.comment = """This is a internal code for mainteing the secrets of the
-        personal datas of the new holder"""
     serial_number = Column(Unicode(), check_lower('serial_number'))
     serial_number.comment = """The serial number of the Hard Disk in lower case."""
     time = Column(SmallInteger, nullable=False)
 
+    @property
+    def final_user_code(self):
+        """ show the final_user_code of the last action Allocate."""
+        actions = self.device.actions
+        actions.sort(key=lambda x: x.created)
+        for e in reversed(actions):
+            if isinstance(e, Allocate) and e.created < self.created:
+                return e.final_user_code
+
+    @property
+    def hours_of_use(self):
+        """Show how many hours is used one device from the last check"""
+        actions = self.device.actions
+        actions.sort(key=lambda x: x.created)
+        # import pdb; pdb.set_trace()
+        for e in reversed(actions):
+            if isinstance(e, Snapshot) and e.created < self.created:
+                return self.time - self.get_last_power_cycle(e)
+
+            if isinstance(e, Live) and e.created < self.created:
+                return self.time - e.time
+
+    def get_last_power_cycle(self, snapshot):
+        test_hdd= [a for a in snapshot.actions if a.type == "TestDataStorage"]
+        if not (test_hdd and snapshot.device.allocated):
+            return 0
+
+        return test_hdd[0].power_cycle_count
+                
 
 class Organize(JoinedTableMixin, ActionWithMultipleDevices):
     """The act of manipulating/administering/supervising/controlling
diff --git a/ereuse_devicehub/resources/action/schemas.py b/ereuse_devicehub/resources/action/schemas.py
index 864043c9..c4aeeca0 100644
--- a/ereuse_devicehub/resources/action/schemas.py
+++ b/ereuse_devicehub/resources/action/schemas.py
@@ -415,6 +415,7 @@ class Live(ActionWithOneDevice):
     final_user_code = SanitizedStr(data_key="finalUserCode", dump_only=True)
     serial_number = SanitizedStr(data_key="serialNumber", dump_only=True)
     time = Integer(dump_only=False)
+    hours_of_use = Integer(dump_only=False)
 
 
 class Organize(ActionWithMultipleDevices):
diff --git a/tests/test_action.py b/tests/test_action.py
index 79cfa89c..633bee92 100644
--- a/tests/test_action.py
+++ b/tests/test_action.py
@@ -255,6 +255,7 @@ def test_live(user: UserClient, app: Devicehub):
     db_device = Device.query.filter_by(id=1).one()
     post_request = {"transaction": "ccc", "name": "John", "endUsers": 1,
                     "devices": [device_id], "description": "aaa",
+                    "finalUserCode": "abcdefjhi",
                     "startTime": "2020-11-01T02:00:00+00:00",
                     "endTime": "2020-12-01T02:00:00+00:00"
     }
@@ -269,6 +270,8 @@ def test_live(user: UserClient, app: Devicehub):
     action_live = [a for a in db_device.actions if a.type == 'Live']
     assert len(action_live) == 1
     assert action_live[0].time == 6293
+    assert action_live[0].hours_of_use == 0
+    assert action_live[0].final_user_code == post_request['finalUserCode']
     assert action_live[0].serial_number == 'wd-wx11a80w7430'