diff --git a/raillabel/json_format/stream_other.py b/raillabel/json_format/stream_other.py
new file mode 100644
index 0000000..6c5da7d
--- /dev/null
+++ b/raillabel/json_format/stream_other.py
@@ -0,0 +1,24 @@
+# Copyright DB InfraGO AG and contributors
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal
+
+from pydantic import BaseModel
+
+
+class JSONStreamRadar(BaseModel):
+    """A stream describes the source of a data sequence, usually a sensor.
+
+    This specific object describes a sensor without intrinsic calibration.
+    """
+
+    type: Literal["lidar", "gps_imu", "other"]
+    "A string encoding the type of the stream."
+
+    uri: str | None
+    "A string encoding the subdirectory containing the sensor files."
+
+    description: str | None
+    "Description of the stream."