diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 76d18af4..f02c2d01 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -564,30 +564,68 @@ class NewActionForm(ActionFormMix):
 
 class AllocateForm(ActionFormMix):
     start_time = DateField('Start time')
-    end_time = DateField('End time')
-    final_user_code = StringField('Final user code', [validators.length(max=50)])
-    transaction = StringField('Transaction', [validators.length(max=50)])
-    end_users = IntegerField('End users')
+    end_time = DateField('End time', [validators.Optional()])
+    final_user_code = StringField(
+        'Final user code', [validators.Optional(), validators.length(max=50)]
+    )
+    transaction = StringField(
+        'Transaction', [validators.Optional(), validators.length(max=50)]
+    )
+    end_users = IntegerField('End users', [validators.Optional()])
 
     def validate(self, extra_validators=None):
-        is_valid = super().validate(extra_validators)
+        if not super().validate(extra_validators):
+            return False
 
         if self.type.data not in ['Allocate', 'Deallocate']:
             return False
 
+        if not self.validate_dates():
+            return False
+
+        if not self.check_devices():
+            return False
+
+        return True
+
+    def validate_dates(self):
         start_time = self.start_time.data
         end_time = self.end_time.data
+
+        if not start_time:
+            self.start_time.errors = ['Not a valid date value.!']
+            return False
+
         if start_time and end_time and end_time < start_time:
             error = ['The action cannot finish before it starts.']
-            self.start_time.errors = error
             self.end_time.errors = error
-            is_valid = False
+            return False
 
-        if not self.end_users.data:
-            self.end_users.errors = ["You need to specify a number of users"]
-            is_valid = False
+        if not end_time:
+            self.end_time.data = self.start_time.data
 
-        return is_valid
+        return True
+
+    def check_devices(self):
+        if self.type.data == 'Allocate':
+            txt = "You need deallocate before allocate this device again"
+            for device in self._devices:
+                if device.allocated:
+                    self.devices.errors = [txt]
+                    return False
+
+                device.allocated = True
+
+        if self.type.data == 'Deallocate':
+            txt = "Sorry some of this devices are actually deallocate"
+            for device in self._devices:
+                if not device.allocated:
+                    self.devices.errors = [txt]
+                    return False
+
+                device.allocated = False
+
+        return True
 
 
 class DataWipeDocumentForm(Form):
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index dcd16b68..1bd33cf6 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -10,7 +10,7 @@ from typing import Dict, List, Set
 from boltons import urlutils
 from citext import CIText
 from ereuse_utils.naming import HID_CONVERSION_DOC, Naming
-from flask import g
+from flask import g, request
 from flask_sqlalchemy import event
 from more_itertools import unique_everseen
 from sqlalchemy import BigInteger, Boolean, Column
@@ -297,6 +297,11 @@ class Device(Thing):
         actions.reverse()
         return actions
 
+    @property
+    def public_link(self) -> str:
+        host_url = request.host_url.strip('/')
+        return "{}{}".format(host_url, self.url.to_text())
+
     @property
     def url(self) -> urlutils.URL:
         """The URL where to GET this device."""
diff --git a/ereuse_devicehub/templates/inventory/device_detail.html b/ereuse_devicehub/templates/inventory/device_detail.html
index 7a96c4a9..f18c1e0e 100644
--- a/ereuse_devicehub/templates/inventory/device_detail.html
+++ b/ereuse_devicehub/templates/inventory/device_detail.html
@@ -26,6 +26,14 @@
               <button class="nav-link active" data-bs-toggle="tab" data-bs-target="#type">Type</button>
             </li>
 
+            <li class="nav-item">
+              <a class="nav-link" href="{{ device.public_link }}" target="_blank">Web</a>
+            </li>
+
+            <li class="nav-item">
+              <button class="nav-link" data-bs-toggle="tab" data-bs-target="#lots">Lots</button>
+            </li>
+
             <li class="nav-item">
               <button class="nav-link" data-bs-toggle="tab" data-bs-target="#status">Status</button>
             </li>
@@ -69,6 +77,50 @@
               </div>
             </div>
 
+            <div class="tab-pane fade profile-overview" id="lots">
+              <h5 class="card-title">Incoming Lots</h5>
+
+              <div class="row">
+              {% for lot in device.lots %}
+                {% if lot.is_incoming %}
+                <div class="col">
+                  <a class="ms-3" href="{{ url_for('inventory.lotdevicelist', lot_id=lot.id) }}">
+                    <span>{{ lot.name }}</span>
+                  </a>
+                </div>
+                {% endif %}
+              {% endfor %}
+              </div>
+
+              <h5 class="card-title">Outgoing Lots</h5>
+
+              <div class="row">
+              {% for lot in device.lots %}
+                {% if lot.is_outgoing %}
+                <div class="col">
+                  <a class="ms-3" href="{{ url_for('inventory.lotdevicelist', lot_id=lot.id) }}">
+                    <span>{{ lot.name }}</span>
+                  </a>
+                </div>
+                {% endif %}
+              {% endfor %}
+              </div>
+
+              <h5 class="card-title">Temporary Lots</h5>
+
+              <div class="row">
+              {% for lot in device.lots %}
+                {% if lot.is_temporary %}
+                <div class="col">
+                  <a class="ms-3" href="{{ url_for('inventory.lotdevicelist', lot_id=lot.id) }}">
+                    <span>{{ lot.name }}</span>
+                  </a>
+                </div>
+                {% endif %}
+              {% endfor %}
+              </div>
+            </div>
+
             <div class="tab-pane fade profile-overview" id="status">
               <h5 class="card-title">Status Details</h5>
               <div class="row">
diff --git a/tests/test_render_2_0.py b/tests/test_render_2_0.py
index c8c045b9..d92a4d04 100644
--- a/tests/test_render_2_0.py
+++ b/tests/test_render_2_0.py
@@ -668,7 +668,7 @@ def test_action_allocate_error_required(user3: UserClientFlask):
     body, status = user3.post(uri, data=data)
     assert status == '200 OK'
     assert 'Action Allocate error' in body
-    assert 'You need to specify a number of users!' in body
+    assert 'Not a valid date value.' in body
 
 
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