diff --git a/product.py b/product.py
index 37152ff..7758136 100644
--- a/product.py
+++ b/product.py
@@ -17,15 +17,16 @@ class Product(metaclass=PoolMeta):
     machine = fields.Boolean('It is machine')
     risk = fields.Selection(_RISK, 'Type risk')
     use  = fields.Selection(_USE, 'Use')
-    biomedical_class = fields.Selection(_BIOMEDICAL_CLASS, 'Biomedical Class')
-    main_tecnology = fields.Selection(_MAIN_TECNOLOGY, 'Main tecnology')
+    biomedical_class = fields.Selection(_BIOMEDICAL_CLASS,
+                                'Biomedical Class')
+    main_tecnology = fields.Selection(_MAIN_TECNOLOGY,
+                                'Main tecnology')
     calibration = fields.Boolean("Apply calibration")
     observation = fields.Text(size=None)
     trade_mark = fields.Char("Trade Mark", size=None, required=True)
     model  = fields.Char("Model", size=None, required=True)
     reference = fields.Char("Reference", size=None, required=True)
-    origin_country = fields.Char(
-        "Origin country", size=None, required=True)
+    origin_country = fields.Many2One('country.country',"Origin Country")
     software_version = fields.Char(
         "Origin country", size=None, required=True)
     useful_life = fields.Char(