diff --git a/README.md b/README.md
index 70316e1b..8647c18b 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ In [12]: mydoorbell.
                      mydoorbell.account_id                      mydoorbell.kind
                      mydoorbell.address                         mydoorbell.last_recording_id
                      mydoorbell.battery_life                    mydoorbell.latitude
-                     mydoorbell.check_activity                  mydoorbell.live_streaming_json
+                     mydoorbell.check_alerts                    mydoorbell.live_streaming_json
                      mydoorbell.debug                           mydoorbell.longitude
                      mydoorbell.existing_doorbell_type          mydoorbell.name
                      mydoorbell.existing_doorbell_type_duration mydoorbell.recording_download
diff --git a/ring_doorbell/__init__.py b/ring_doorbell/__init__.py
index 869139dd..a23b6d26 100644
--- a/ring_doorbell/__init__.py
+++ b/ring_doorbell/__init__.py
@@ -13,7 +13,7 @@
 import requests
 import pytz
 
-from ring_doorbell.utils import _locator
+from ring_doorbell.utils import _locator, _save_cache, _read_cache
 from ring_doorbell.const import (
     API_VERSION, API_URI, CHIMES_ENDPOINT, CHIME_VOL_MIN, CHIME_VOL_MAX,
     DEVICES_ENDPOINT, DOORBELLS_ENDPOINT, DOORBELL_VOL_MIN, DOORBELL_VOL_MAX,
@@ -32,7 +32,7 @@ class Ring(object):
     """A Python Abstraction object to Ring Door Bell."""
 
     def __init__(self, username, password, debug=False, persist_token=False,
-                 push_token_notify_url=""):
+                 push_token_notify_url="http://localhost/"):
         """Initialize the Ring object."""
         self.features = None
         self.is_connected = None
@@ -72,7 +72,7 @@ def _authenticate(self, attempts=RETRY_TOKEN):
                 self.params = {'api_version': API_VERSION,
                                'auth_token': self.token}
 
-                if self._persist_token:
+                if self._persist_token and self._push_token_notify_url:
                     url = API_URI + PERSIST_TOKEN_ENDPOINT
                     PERSIST_TOKEN_DATA['auth_token'] = self.token
                     PERSIST_TOKEN_DATA['device[push_notification_token]'] = \
@@ -140,7 +140,9 @@ def query(self,
                     if method == 'GET':
                         response = req.json()
                 break
-        _LOGGER.error("%s", MSG_GENERIC_FAIL)
+
+        if self.debug:
+            _LOGGER.debug("%s", MSG_GENERIC_FAIL)
         return response
 
     @property
@@ -199,6 +201,11 @@ def __init__(self):
         self.family = None
         self.name = None
 
+        # alerts notifications
+        self._alert_cache = None
+        self.alert = None
+        self.alert_expires_at = None
+
     def __repr__(self):
         """Return __repr__."""
         return "<{0}: {1}>".format(self.__class__.__name__, self.name)
@@ -206,6 +213,28 @@ def __repr__(self):
     def update(self):
         """Refresh attributes."""
         self._get_attrs()
+        self._update_alert()
+
+    def _update_alert(self):
+        """Verify if alert received is still valid."""
+        if self.alert and self.alert_expires_at:
+            if datetime.now() >= self.alert_expires_at:
+                self.alert = None
+                self.alert_expires_at = None
+        elif self._alert_cache:
+            aux = _read_cache(self._alert_cache)
+            if ((isinstance(aux, dict)) and
+                    ('now' in aux) and
+                    ('expires_in' in aux)):
+                aux_expires_at = datetime.fromtimestamp(
+                    aux.get('now') + aux.get('expires_in'))
+
+                # verify if pickle object is still valid
+                if datetime.now() <= aux_expires_at:
+                    self.alert = aux
+                    self.alert_expires_at = aux_expires_at
+                else:
+                    _save_cache(None, self._alert_cache)
 
     def _get_attrs(self):
         """Return chime attributes."""
@@ -332,11 +361,31 @@ def battery_life(self):
             value = 100
         return value
 
-    @property
-    def check_activity(self):
+    def check_alerts(self, cache=None):
         """Return JSON when motion or ring is detected."""
+        # save alerts attributes to an external pickle file
+        # when multiple resources are checking for alerts
+        if cache:
+            self._alert_cache = cache
+
         url = API_URI + DINGS_ENDPOINT
-        return self._ring.query(url)
+        self.update()
+
+        try:
+            resp = self._ring.query(url)[0]
+        except IndexError:
+            return None
+
+        if resp:
+            timestamp = resp.get('now') + resp.get('expires_in')
+            self.alert = resp
+            self.alert_expires_at = datetime.fromtimestamp(timestamp)
+
+            # save to a pickle data
+            if self._alert_cache:
+                _save_cache(self.alert, self._alert_cache)
+            return True
+        return None
 
     @property
     def existing_doorbell_type(self):
diff --git a/ring_doorbell/utils.py b/ring_doorbell/utils.py
index 18bf0495..eaa02ade 100644
--- a/ring_doorbell/utils.py
+++ b/ring_doorbell/utils.py
@@ -1,8 +1,14 @@
 # coding: utf-8
 # vim:sw=4:ts=4:et:
 """Python Ring Doorbell utils."""
+import os
 from ring_doorbell.const import NOT_FOUND
 
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
+
 
 def _locator(lst, key, value):
     """Return the position of a match item in list."""
@@ -11,3 +17,23 @@ def _locator(lst, key, value):
                     if d[key] == value)
     except StopIteration:
         return NOT_FOUND
+
+
+def _save_cache(data, filename):
+    """Dump data into a pickle file."""
+    try:
+        with open(filename, 'wb') as pickle_db:
+            pickle.dump(data, pickle_db)
+        return True
+    except:
+        raise
+
+
+def _read_cache(filename):
+    """Read data from a pickle file."""
+    try:
+        if os.path.isfile(filename):
+            return pickle.load(open(filename, 'rb'))
+    except:
+        raise
+    return None