diff --git a/src/expansion/AnalogExpansion.h b/src/expansion/AnalogExpansion.h
index 60d7470..2cacc67 100644
--- a/src/expansion/AnalogExpansion.h
+++ b/src/expansion/AnalogExpansion.h
@@ -37,7 +37,7 @@ class AnalogExpansion : public Expansion
   static SharedPtr create(UA_Server *server, UA_NodeId const parent_node_id, uint8_t const exp_num)
   {
     char display_name[64] = {0};
-    snprintf(display_name, sizeof(display_name), "Expansion %d: Analog", exp_num);
+    snprintf(display_name, sizeof(display_name), "Arduino Opta Expansion %d: Analog", exp_num);
 
     char node_name[32] = {0};
     snprintf(node_name, sizeof(node_name), "AnaExp_%d", exp_num);
diff --git a/src/expansion/DigitalMechExpansion.h b/src/expansion/DigitalMechExpansion.h
index ba99223..8908487 100644
--- a/src/expansion/DigitalMechExpansion.h
+++ b/src/expansion/DigitalMechExpansion.h
@@ -35,7 +35,7 @@ class DigitalMechExpansion : public DigitalExpansion
   static SharedPtr create(UA_Server *server, UA_NodeId const parent_node_id, uint8_t const exp_num)
   {
     char display_name[64] = {0};
-    snprintf(display_name, sizeof(display_name), "Expansion %d: Digital (Mechanical)", exp_num);
+    snprintf(display_name, sizeof(display_name), "Arduino Opta Expansion %d: Digital (Mechanical)", exp_num);
 
     char node_name[32] = {0};
     snprintf(node_name, sizeof(node_name), "DigExpSoli_%d", exp_num);
diff --git a/src/expansion/DigitalStSolidExpansion.h b/src/expansion/DigitalStSolidExpansion.h
index b6c0cb9..a458fef 100644
--- a/src/expansion/DigitalStSolidExpansion.h
+++ b/src/expansion/DigitalStSolidExpansion.h
@@ -35,7 +35,7 @@ class DigitalStSolidExpansion : public DigitalExpansion
   static SharedPtr create(UA_Server *server, UA_NodeId const parent_node_id, uint8_t const exp_num)
   {
     char display_name[64] = {0};
-    snprintf(display_name, sizeof(display_name), "Expansion %d: Digital (Solid State)", exp_num);
+    snprintf(display_name, sizeof(display_name), "Arduino Opta Expansion %d: Digital (Solid State)", exp_num);
 
     char node_name[32] = {0};
     snprintf(node_name, sizeof(node_name), "DigExpSoli_%d", exp_num);