diff --git a/golem_activity_registration_slot/models/golem_activity.py b/golem_activity_registration_slot/models/golem_activity.py
new file mode 100644
index 0000000..31dce94
--- /dev/null
+++ b/golem_activity_registration_slot/models/golem_activity.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+
+#    Copyright 2018 Youssef El Ouahby <youssef@yaltik.com>
+#    Copyright 2018 Fabien Bourgeois <fabien@yaltik.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+""" GOLEM Activity adaptations """
+
+from odoo import models, fields, api, _
+
+class GolemActivity(models.Model):
+    """ GOLEM Activity adaptations """
+    _inherit = 'golem.activity'
+
+    individual_slots = fields.Boolean(string='Individual slots activity')
+    slots_number = fields.Integer(string='Registration Slot Number')
+    slots_duration = fields.Float(string='Registration Slot Duration')
+    registration_slot_ids = fields.One2many('golem.activity.registration.slot', 'activity_id',
+                                            string='Registration Slots')