diff --git a/src/xiaomi_ble/devices.py b/src/xiaomi_ble/devices.py
index 53d01a9..431d350 100644
--- a/src/xiaomi_ble/devices.py
+++ b/src/xiaomi_ble/devices.py
@@ -81,6 +81,7 @@ class DeviceEntry:
         name="Motion Sensor",
         model="HS1BB(MI)",
     ),
+    0x3F0F: DeviceEntry(name="Flood and Rain Sensor", model="RS1BB(MI)"),
     0x01AA: DeviceEntry(
         name="Temperature/Humidity Sensor",
         model="LYWSDCGQ",
diff --git a/src/xiaomi_ble/parser.py b/src/xiaomi_ble/parser.py
index 04d3aa8..1416ef4 100644
--- a/src/xiaomi_ble/parser.py
+++ b/src/xiaomi_ble/parser.py
@@ -1044,6 +1044,16 @@ def obj4805(
     return {}
 
 
+def obj4806(
+    xobj: bytes, device: XiaomiBluetoothDeviceData, device_type: str
+) -> dict[str, Any]:
+    """Moisture"""
+    device.update_predefined_binary_sensor(
+        BinarySensorDeviceClass.MOISTURE, xobj[0] > 0
+    )
+    return {}
+
+
 def obj4818(
     xobj: bytes, device: XiaomiBluetoothDeviceData, device_type: str
 ) -> dict[str, Any]:
@@ -1428,6 +1438,7 @@ def obj4e1c(
     0x4803: obj4803,
     0x4804: obj4804,
     0x4805: obj4805,
+    0x4806: obj4806,
     0x4818: obj4818,
     0x4A01: obj4a01,
     0x4A08: obj4a08,
@@ -1620,7 +1631,7 @@ def _parse_xiaomi(
             xiaomi_mac = xiaomi_mac_reversed[::-1]
             if xiaomi_mac != source_mac:
                 _LOGGER.debug(
-                    "MAC address doesn't match data frame. Expected: %s, Got: %s)",
+                    "MAC address doesn't match data frame. Expected: %s, Got: %s",
                     to_mac(xiaomi_mac),
                     to_mac(source_mac),
                 )
diff --git a/tests/test_parser.py b/tests/test_parser.py
index fd763ef..05eb95f 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -2483,6 +2483,52 @@ def test_Xiaomi_MS1BB_MI_obj4a13():
     )
 
 
+def test_Xiaomi_RS1BB_MI_obj4806():
+    """Test Xiaomi parser for Linptech RS1BB(MI) with obj4806."""
+    data_string = b"XY\x0f?JgL\xb98\xc1\xa4\xd6\xe5{\x83\x04\x00\x00\xd0\x1e\x0bK"
+    advertisement = bytes_to_service_info(data_string, address="A4:C1:38:B9:4C:67")
+    bindkey = "33ede53321bc73c790a8daae4581f3d5"
+
+    device = XiaomiBluetoothDeviceData(bindkey=bytes.fromhex(bindkey))
+    assert device.supported(advertisement)
+    assert device.bindkey_verified
+    assert device.update(advertisement) == SensorUpdate(
+        title="Flood and Rain Sensor 4C67 (RS1BB(MI))",
+        devices={
+            None: SensorDeviceInfo(
+                name="Flood and Rain Sensor 4C67",
+                manufacturer="Xiaomi",
+                model="RS1BB(MI)",
+                hw_version=None,
+                sw_version="Xiaomi (MiBeacon V5 encrypted)",
+            )
+        },
+        entity_descriptions={
+            KEY_SIGNAL_STRENGTH: SensorDescription(
+                device_key=KEY_SIGNAL_STRENGTH,
+                device_class=DeviceClass.SIGNAL_STRENGTH,
+                native_unit_of_measurement="dBm",
+            ),
+        },
+        entity_values={
+            KEY_SIGNAL_STRENGTH: SensorValue(
+                name="Signal Strength", device_key=KEY_SIGNAL_STRENGTH, native_value=-60
+            ),
+        },
+        binary_entity_descriptions={
+            KEY_MOISTURE: BinarySensorDescription(
+                device_key=KEY_MOISTURE,
+                device_class=BinarySensorDeviceClass.MOISTURE,
+            ),
+        },
+        binary_entity_values={
+            KEY_MOISTURE: BinarySensorValue(
+                name="Moisture", device_key=KEY_MOISTURE, native_value=False
+            ),
+        },
+    )
+
+
 def test_Xiaomi_XMWXKG01YL():
     """Test Xiaomi parser for XMWXKG01YL Switch (double button)."""
     data_string = b"XYI\x19Os\x12\x87\x83\xed\xdc\x0b48\n\x02\x00\x00\x8dI\xae("