diff --git a/src/revpi_middleware/ios1/interface_devices.py b/src/revpi_middleware/ios1/interface_devices.py
index 70da85e..0864de5 100644
--- a/src/revpi_middleware/ios1/interface_devices.py
+++ b/src/revpi_middleware/ios1/interface_devices.py
@@ -16,6 +16,12 @@ class InterfaceDevice:
     """
     <node>
         <interface name="com.revolutionpi.ios1.Device">
+            <method name="GetDeviceInputs">
+                <arg name="object-path-list" type="ao" direction="out"/>
+            </method>
+            <method name="GetDeviceOutputs">
+                <arg name="object-path-list" type="ao" direction="out"/>
+            </method>
             <property name="bmk" type="s" access="read">
                 <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
             </property>
@@ -28,15 +34,9 @@ class InterfaceDevice:
             <property name="id" type="s" access="read">
                 <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
             </property>
-            <property name="inp" type="ao" access="read">
-                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
-            </property>
             <property name="name" type="s" access="read">
                 <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
             </property>
-            <property name="out" type="ao" access="read">
-                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
-            </property>
             <property name="position" type="n" access="read">
                 <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
             </property>
@@ -55,6 +55,12 @@ class InterfaceDevice:
         self.device = device
         self.object_path = get_device_object_path(device)
 
+    def GetDeviceInputs(self) -> list[str]:
+        return [get_io_object_path(io) for io in self.device.get_inputs()]
+
+    def GetDeviceOutputs(self) -> list[str]:
+        return [get_io_object_path(io) for io in self.device.get_outputs()]
+
     @property
     def bmk(self) -> str:
         return self.device.bmk
@@ -71,18 +77,10 @@ class InterfaceDevice:
     def id(self):
         return self.device.id
 
-    @property
-    def inp(self) -> list[str]:
-        return [get_io_object_path(io) for io in self.device.get_inputs()]
-
     @property
     def name(self) -> str:
         return self.device.name
 
-    @property
-    def out(self) -> list[str]:
-        return [get_io_object_path(io) for io in self.device.get_outputs()]
-
     @property
     def position(self) -> int:
         return self.device.position