diff --git a/miio/__init__.py b/miio/__init__.py
index 2bc23a199..1a7b25b2f 100644
--- a/miio/__init__.py
+++ b/miio/__init__.py
@@ -33,6 +33,7 @@
 from miio.device import Device
 from miio.exceptions import DeviceError, DeviceException
 from miio.fan import Fan, FanP5, FanSA1, FanV2, FanZA1, FanZA4
+from miio.fan_leshow import FanLeshow
 from miio.fan_miot import FanMiot, FanP9, FanP10, FanP11
 from miio.gateway import Gateway
 from miio.heater import Heater
diff --git a/miio/fan_leshow.py b/miio/fan_leshow.py
new file mode 100644
index 000000000..4ee4d56c4
--- /dev/null
+++ b/miio/fan_leshow.py
@@ -0,0 +1,217 @@
+import enum
+import logging
+from typing import Any, Dict
+
+import click
+
+from .click_common import EnumType, command, format_output
+from .device import Device
+from .exceptions import DeviceException
+
+_LOGGER = logging.getLogger(__name__)
+
+MODEL_FAN_LESHOW_SS4 = "leshow.fan.ss4"
+
+AVAILABLE_PROPERTIES_COMMON = [
+    "power",
+    "mode",
+    "blow",
+    "timer",
+    "sound",
+    "yaw",
+    "fault",
+]
+
+AVAILABLE_PROPERTIES = {
+    MODEL_FAN_LESHOW_SS4: AVAILABLE_PROPERTIES_COMMON,
+}
+
+
+class FanLeshowException(DeviceException):
+    pass
+
+
+class OperationMode(enum.Enum):
+    Manual = 0
+    Sleep = 1
+    Strong = 2
+    Natural = 3
+
+
+class FanLeshowStatus:
+    """Container for status reports from the Xiaomi Rosou SS4 Ventilator."""
+
+    def __init__(self, data: Dict[str, Any]) -> None:
+        """
+        Response of a Leshow Fan SS4 ():
+
+        {'power': 1, 'mode': 2, 'blow': 100, 'timer': 0,
+         'sound': 1, 'yaw': 0, 'fault': 0}
+
+        """
+        self.data = data
+
+    @property
+    def power(self) -> str:
+        """Power state."""
+        return "on" if self.data["power"] == 1 else "off"
+
+    @property
+    def is_on(self) -> bool:
+        """True if device is turned on."""
+        return self.data["power"] == 1
+
+    @property
+    def mode(self) -> OperationMode:
+        """Operation mode. Can be either 0, 1, 2 or 3."""
+        return OperationMode(self.data["mode"])
+
+    @property
+    def speed(self) -> int:
+        """Speed of the fan in percent."""
+        return self.data["blow"]
+
+    @property
+    def buzzer(self) -> bool:
+        """True if buzzer is turned on."""
+        return self.data["sound"] == 1
+
+    @property
+    def oscillate(self) -> bool:
+        """True if oscillation is enabled."""
+        return self.data["yaw"] == 1
+
+    @property
+    def delay_off_countdown(self) -> int:
+        """Countdown until turning off in minutes."""
+        return self.data["timer"]
+
+    @property
+    def error_detected(self) -> bool:
+        """True if a fault was detected."""
+        return self.data["fault"] == 1
+
+    def __repr__(self) -> str:
+        s = (
+            "<FanLeshowStatus power=%s, "
+            "mode=%s, "
+            "speed=%s, "
+            "buzzer=%s, "
+            "oscillate=%s, "
+            "delay_off_countdown=%s, "
+            "error_detected=%s>"
+            % (
+                self.power,
+                self.mode,
+                self.speed,
+                self.buzzer,
+                self.oscillate,
+                self.delay_off_countdown,
+                self.error_detected,
+            )
+        )
+        return s
+
+
+class FanLeshow(Device):
+    """Main class representing the Xiaomi Rosou SS4 Ventilator."""
+
+    def __init__(
+        self,
+        ip: str = None,
+        token: str = None,
+        start_id: int = 0,
+        debug: int = 0,
+        lazy_discover: bool = True,
+        model: str = MODEL_FAN_LESHOW_SS4,
+    ) -> None:
+        super().__init__(ip, token, start_id, debug, lazy_discover)
+
+        if model in AVAILABLE_PROPERTIES:
+            self.model = model
+        else:
+            self.model = MODEL_FAN_LESHOW_SS4
+
+    @command(
+        default_output=format_output(
+            "",
+            "Power: {result.power}\n"
+            "Mode: {result.mode}\n"
+            "Speed: {result.speed}\n"
+            "Buzzer: {result.buzzer}\n"
+            "Oscillate: {result.oscillate}\n"
+            "Power-off time: {result.delay_off_countdown}\n"
+            "Error detected: {result.error_detected}\n",
+        )
+    )
+    def status(self) -> FanLeshowStatus:
+        """Retrieve properties."""
+        properties = AVAILABLE_PROPERTIES[self.model]
+        values = self.get_properties(properties, max_properties=15)
+
+        return FanLeshowStatus(dict(zip(properties, values)))
+
+    @command(default_output=format_output("Powering on"))
+    def on(self):
+        """Power on."""
+        return self.send("set_power", [1])
+
+    @command(default_output=format_output("Powering off"))
+    def off(self):
+        """Power off."""
+        return self.send("set_power", [0])
+
+    @command(
+        click.argument("mode", type=EnumType(OperationMode)),
+        default_output=format_output("Setting mode to '{mode.value}'"),
+    )
+    def set_mode(self, mode: OperationMode):
+        """Set mode."""
+        return self.send("set_mode", [mode.value])
+
+    @command(
+        click.argument("speed", type=int),
+        default_output=format_output("Setting speed of the manual mode to {speed}"),
+    )
+    def set_speed(self, speed: int):
+        """Set natural level."""
+        if speed < 0 or speed > 100:
+            raise FanLeshowException("Invalid speed: %s" % speed)
+
+        return self.send("set_blow", [speed])
+
+    @command(
+        click.argument("oscillate", type=bool),
+        default_output=format_output(
+            lambda oscillate: "Turning on oscillate"
+            if oscillate
+            else "Turning off oscillate"
+        ),
+    )
+    def set_oscillate(self, oscillate: bool):
+        """Set oscillate on/off."""
+        return self.send("set_yaw", [int(oscillate)])
+
+    @command(
+        click.argument("buzzer", type=bool),
+        default_output=format_output(
+            lambda buzzer: "Turning on buzzer" if buzzer else "Turning off buzzer"
+        ),
+    )
+    def set_buzzer(self, buzzer: bool):
+        """Set buzzer on/off."""
+        return self.send("set_sound", [int(buzzer)])
+
+    @command(
+        click.argument("minutes", type=int),
+        default_output=format_output("Setting delayed turn off to {minutes} minutes"),
+    )
+    def delay_off(self, minutes: int):
+        """Set delay off minutes."""
+
+        if minutes < 0 or minutes > 999:
+            raise FanLeshowException(
+                "Invalid value for a delayed turn off: %s" % minutes
+            )
+
+        return self.send("set_timer", [minutes])
diff --git a/miio/tests/test_fan_leshow.py b/miio/tests/test_fan_leshow.py
new file mode 100644
index 000000000..e918f919f
--- /dev/null
+++ b/miio/tests/test_fan_leshow.py
@@ -0,0 +1,133 @@
+from unittest import TestCase
+
+import pytest
+
+from miio import FanLeshow
+from miio.fan_leshow import (
+    MODEL_FAN_LESHOW_SS4,
+    FanLeshowException,
+    FanLeshowStatus,
+    OperationMode,
+)
+
+from .dummies import DummyDevice
+
+
+class DummyFanLeshow(DummyDevice, FanLeshow):
+    def __init__(self, *args, **kwargs):
+        self.model = MODEL_FAN_LESHOW_SS4
+        self.state = {
+            "power": 1,
+            "mode": 2,
+            "blow": 100,
+            "timer": 0,
+            "sound": 1,
+            "yaw": 0,
+            "fault": 0,
+        }
+        self.return_values = {
+            "get_prop": self._get_state,
+            "set_power": lambda x: self._set_state("power", x),
+            "set_mode": lambda x: self._set_state("mode", x),
+            "set_blow": lambda x: self._set_state("blow", x),
+            "set_timer": lambda x: self._set_state("timer", x),
+            "set_sound": lambda x: self._set_state("sound", x),
+            "set_yaw": lambda x: self._set_state("yaw", x),
+        }
+        super().__init__(args, kwargs)
+
+
+@pytest.fixture(scope="class")
+def fanleshow(request):
+    request.cls.device = DummyFanLeshow()
+    # TODO add ability to test on a real device
+
+
+@pytest.mark.usefixtures("fanleshow")
+class TestFanLeshow(TestCase):
+    def is_on(self):
+        return self.device.status().is_on
+
+    def state(self):
+        return self.device.status()
+
+    def test_on(self):
+        self.device.off()  # ensure off
+        assert self.is_on() is False
+
+        self.device.on()
+        assert self.is_on() is True
+
+    def test_off(self):
+        self.device.on()  # ensure on
+        assert self.is_on() is True
+
+        self.device.off()
+        assert self.is_on() is False
+
+    def test_status(self):
+        self.device._reset_state()
+
+        assert repr(self.state()) == repr(FanLeshowStatus(self.device.start_state))
+
+        assert self.is_on() is True
+        assert self.state().mode == OperationMode(self.device.start_state["mode"])
+        assert self.state().speed == self.device.start_state["blow"]
+        assert self.state().buzzer is (self.device.start_state["sound"] == 1)
+        assert self.state().oscillate is (self.device.start_state["yaw"] == 1)
+        assert self.state().delay_off_countdown == self.device.start_state["timer"]
+        assert self.state().error_detected is (self.device.start_state["fault"] == 1)
+
+    def test_set_speed(self):
+        def speed():
+            return self.device.status().speed
+
+        self.device.set_speed(0)
+        assert speed() == 0
+        self.device.set_speed(1)
+        assert speed() == 1
+        self.device.set_speed(100)
+        assert speed() == 100
+
+        with pytest.raises(FanLeshowException):
+            self.device.set_speed(-1)
+
+        with pytest.raises(FanLeshowException):
+            self.device.set_speed(101)
+
+    def test_set_oscillate(self):
+        def oscillate():
+            return self.device.status().oscillate
+
+        self.device.set_oscillate(True)
+        assert oscillate() is True
+
+        self.device.set_oscillate(False)
+        assert oscillate() is False
+
+    def test_set_buzzer(self):
+        def buzzer():
+            return self.device.status().buzzer
+
+        self.device.set_buzzer(True)
+        assert buzzer() is True
+
+        self.device.set_buzzer(False)
+        assert buzzer() is False
+
+    def test_delay_off(self):
+        def delay_off_countdown():
+            return self.device.status().delay_off_countdown
+
+        self.device.delay_off(100)
+        assert delay_off_countdown() == 100
+        self.device.delay_off(200)
+        assert delay_off_countdown() == 200
+        self.device.delay_off(0)
+        assert delay_off_countdown() == 0
+
+        with pytest.raises(FanLeshowException):
+            self.device.delay_off(-1)
+
+        with pytest.raises(FanLeshowException):
+            self.device.delay_off(1000)