diff --git a/PyViCare/PyViCareDevice.py b/PyViCare/PyViCareDevice.py
index 4a1d0525..13f77f4a 100644
--- a/PyViCare/PyViCareDevice.py
+++ b/PyViCare/PyViCareDevice.py
@@ -15,3 +15,9 @@ def __init__(self, service: ViCareService) -> None:
     @handleNotSupported
     def getSerial(self):
         return self.service.getProperty("device.serial")["properties"]["value"]["value"]
+
+    def isLegacyDevice(self) -> bool:
+        return self.service.hasRoles(["type:legacy"])
+
+    def isE3Device(self) -> bool:
+        return self.service.hasRoles(["type:E3"])
diff --git a/tests/test_PyViCareDeviceConfig.py b/tests/test_PyViCareDeviceConfig.py
index c3fbd31e..efe324ef 100644
--- a/tests/test_PyViCareDeviceConfig.py
+++ b/tests/test_PyViCareDeviceConfig.py
@@ -62,7 +62,6 @@ def test_autoDetect_RoleVentilation_asVentilation(self):
         self.assertEqual("VentilationDevice", type(device_type).__name__)
 
     def test_autoDetect_Vitoair_FS_300E_asVentilation(self):
-        # self.service.hasRoles = has_roles(["type:ventilation"])
         c = PyViCareDeviceConfig(self.service, "0", "E3_ViAir_300F", "Online")
         device_type = c.asAutoDetectDevice()
         self.assertEqual("VentilationDevice", type(device_type).__name__)
@@ -121,3 +120,17 @@ def test_autoDetect_RoleGateway_asGateway_TCU300(self):
         c = PyViCareDeviceConfig(self.service, "0", "Unknown", "Online")
         device_type = c.asAutoDetectDevice()
         self.assertEqual("Gateway", type(device_type).__name__)
+
+    def test_legacy_device(self):
+        self.service.hasRoles = has_roles(["type:legacy"])
+        c = PyViCareDeviceConfig(self.service, "0", "Unknown", "Online")
+        device = c.asAutoDetectDevice()
+        self.assertEqual(device.isLegacyDevice(), True)
+        self.assertEqual(device.isE3Device(), False)
+
+    def test_e3_device(self):
+        self.service.hasRoles = has_roles(["type:E3"])
+        c = PyViCareDeviceConfig(self.service, "0", "Unknown", "Online")
+        device = c.asAutoDetectDevice()
+        self.assertEqual(device.isLegacyDevice(), False)
+        self.assertEqual(device.isE3Device(), True)