diff --git a/sqlalchemy_utils/types/arrow.py b/sqlalchemy_utils/types/arrow.py
index 4394acc..0ce67bd 100644
--- a/sqlalchemy_utils/types/arrow.py
+++ b/sqlalchemy_utils/types/arrow.py
@@ -14,6 +14,43 @@ from .scalar_coercible import ScalarCoercible
 
 
 class ArrowType(types.TypeDecorator, ScalarCoercible):
+    """
+    ArrowType provides way of saving Arrow_ objects into database. It
+    automatically changes Arrow_ objects to datatime objects on the way in and
+    datetime objects back to Arrow_ objects on the way out (when querying
+    database). ArrowType needs Arrow_ library installed.
+
+    .. _Arrow: http://crsmithdev.com/arrow/
+
+    ::
+
+        from datetime import datetime
+        from sqlalchemy_utils import ArrowType
+        import arrow
+
+
+        class Article(Base):
+            __tablename__ = 'article'
+            id = sa.Column(sa.Integer, primary_key=True)
+            name = sa.Column(sa.Unicode(255))
+            created_at = sa.Column(ArrowType)
+
+
+
+        article = Article(created_at=arrow.utcnow())
+
+
+    As you may expect all the arrow goodies come available:
+
+    ::
+
+
+        article.created_at = article.created_at.replace(hours=-1)
+
+        article.created_at.humanize()
+        # 'an hour ago'
+
+    """
     impl = types.DateTime
 
     def __init__(self, *args, **kwargs):