diff --git a/whisper_streaming/websocket_client.py b/whisper_streaming/websocket_client.py
new file mode 100644
index 0000000..e842c80
--- /dev/null
+++ b/whisper_streaming/websocket_client.py
@@ -0,0 +1,117 @@
+#!/usr/bin/env python3
+import argparse
+import asyncio
+import json
+from logging import DEBUG, INFO, basicConfig, getLogger
+from typing import Optional, Union
+
+import sounddevice as sd
+import websockets
+from whisper.audio import N_FRAMES, SAMPLE_RATE
+
+from whisper_streaming.schema import ParsedChunk
+
+logger = getLogger(__name__)
+
+
+def sd_callback(indata, frames, time, status):
+    if status:
+        logger.warning(status)
+    loop.call_soon_threadsafe(q.put_nowait, indata.ravel().tobytes())
+
+
+async def transcribe_from_mic_and_send(
+    *,
+    sd_device: Optional[Union[int, str]],
+    num_block: int,
+    host: str,
+    port: int,
+) -> None:
+    uri = f"ws://{host}:{port}"
+
+    with sd.InputStream(
+        samplerate=SAMPLE_RATE,
+        blocksize=N_FRAMES * num_block,
+        device=sd_device,
+        dtype="float32",
+        channels=1,
+        callback=sd_callback,
+    ):
+        async with websockets.connect(uri, max_size=999999999) as ws:  # type:ignore
+            idx: int = 0
+            while True:
+
+                async def g():
+                    return await q.get()
+
+                logger.debug(f"Segment #: {idx}")
+                try:
+                    segment = await asyncio.wait_for(g(), timeout=3.0)
+                except asyncio.TimeoutError:
+                    await ws.send("dummy")
+                    continue
+
+                logger.debug(f"Segment size: {len(segment)}")
+                await ws.send(segment)
+                logger.debug("Sent")
+
+                d = await ws.recv()
+                for c in json.loads(d):
+                    chunk = ParsedChunk.parse_obj(c)
+                    print(f"{chunk.start:.2f}->{chunk.end:.2f}\t{chunk.text}")
+                idx += 1
+
+
+def get_opts() -> argparse.Namespace:
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--host",
+        required=True,
+        help="host of websocker server",
+    )
+    parser.add_argument(
+        "--port",
+        type=int,
+        required=True,
+        help="Port number of websocker server",
+    )
+
+    parser.add_argument(
+        "--mic",
+    )
+    parser.add_argument(
+        "--num_block",
+        "-n",
+        type=int,
+        default=160,
+        help="Number of operation unit",
+    )
+    parser.add_argument(
+        "--debug",
+        action="store_true",
+    )
+
+    return parser.parse_args()
+
+
+async def main() -> None:
+    opts = get_opts()
+    basicConfig(
+        level=DEBUG if opts.debug else INFO,
+        format="[%(asctime)s] %(module)s.%(funcName)s:%(lineno)d %(levelname)s -> %(message)s",
+    )
+    global q
+    global loop
+    loop = asyncio.get_running_loop()
+    q = asyncio.Queue()
+
+    await transcribe_from_mic_and_send(
+        sd_device=opts.mic,
+        num_block=opts.num_block,
+        host=opts.host,
+        port=opts.port,
+    )
+
+
+if __name__ == "__main__":
+    asyncio.run(main())