diff --git a/switchbot/adv_parser.py b/switchbot/adv_parser.py
index fa7e9a8..435c7d4 100644
--- a/switchbot/adv_parser.py
+++ b/switchbot/adv_parser.py
@@ -25,7 +25,7 @@
 from .adv_parsers.motion import process_wopresence
 from .adv_parsers.plug import process_woplugmini
 from .adv_parsers.relay_switch import (
-    process_worelay_switch_1plus,
+    process_worelay_switch_1,
     process_worelay_switch_1pm,
 )
 from .const import SwitchbotModel
@@ -191,9 +191,9 @@ class SwitchbotSupportedType(TypedDict):
         "manufacturer_id": 2409,
     },
     ";": {
-        "modelName": SwitchbotModel.RELAY_SWITCH_1_PLUS,
+        "modelName": SwitchbotModel.RELAY_SWITCH_1,
         "modelFriendlyName": "Relay Switch 1",
-        "func": process_worelay_switch_1plus,
+        "func": process_worelay_switch_1,
         "manufacturer_id": 2409,
     },
 }
diff --git a/switchbot/adv_parsers/relay_switch.py b/switchbot/adv_parsers/relay_switch.py
index fb631f6..4b3a0f4 100644
--- a/switchbot/adv_parsers/relay_switch.py
+++ b/switchbot/adv_parsers/relay_switch.py
@@ -18,7 +18,7 @@ def process_worelay_switch_1pm(
     }
 
 
-def process_worelay_switch_1plus(
+def process_worelay_switch_1(
     data: bytes | None, mfr_data: bytes | None
 ) -> dict[str, bool | int]:
     """Process WoStrip services data."""
diff --git a/switchbot/const.py b/switchbot/const.py
index b01f844..a2581d6 100644
--- a/switchbot/const.py
+++ b/switchbot/const.py
@@ -55,7 +55,7 @@ class SwitchbotModel(StrEnum):
     HUB2 = "WoHub2"
     KEYPAD = "WoKeypad"
     RELAY_SWITCH_1PM = "Relay Switch 1PM"
-    RELAY_SWITCH_1_PLUS = "Relay Switch 1"
+    RELAY_SWITCH_1 = "Relay Switch 1"
 
 
 class LockStatus(Enum):
diff --git a/tests/test_adv_parser.py b/tests/test_adv_parser.py
index b922e6e..1ca3997 100644
--- a/tests/test_adv_parser.py
+++ b/tests/test_adv_parser.py
@@ -1672,3 +1672,68 @@ def test_parse_advertisement_data_keypad():
         rssi=-67,
         active=True,
     )
+
+
+def test_parse_advertisement_data_relay_switch_1pm():
+    """Test parse_advertisement_data for the keypad."""
+    ble_device = generate_ble_device("aa:bb:cc:dd:ee:ff", "any")
+    adv_data = generate_advertisement_data(
+        manufacturer_data={2409: b"$X|\x0866G\x81\x00\x00\x001\x00\x00\x00\x00"},
+        service_data={"0000fd3d-0000-1000-8000-00805f9b34fb": b"<\x00\x00\x00"},
+        rssi=-67,
+    )
+    result = parse_advertisement_data(
+        ble_device, adv_data, SwitchbotModel.RELAY_SWITCH_1PM
+    )
+    assert result == SwitchBotAdvertisement(
+        address="aa:bb:cc:dd:ee:ff",
+        data={
+            "data": {
+                "switchMode": True,
+                "sequence_number": 71,
+                "isOn": True,
+                "power": 4.9,
+                "voltage": 0,
+                "current": 0,
+            },
+            "isEncrypted": False,
+            "model": "<",
+            "modelFriendlyName": "Relay Switch 1PM",
+            "modelName": SwitchbotModel.RELAY_SWITCH_1PM,
+            "rawAdvData": b"<\x00\x00\x00",
+        },
+        device=ble_device,
+        rssi=-67,
+        active=True,
+    )
+
+
+def test_parse_advertisement_data_relay_switch_1():
+    """Test parse_advertisement_data for the keypad."""
+    ble_device = generate_ble_device("aa:bb:cc:dd:ee:ff", "any")
+    adv_data = generate_advertisement_data(
+        manufacturer_data={2409: b"$X|\x0866G\x81\x00\x00\x001\x00\x00\x00\x00"},
+        service_data={"0000fd3d-0000-1000-8000-00805f9b34fb": b";\x00\x00\x00"},
+        rssi=-67,
+    )
+    result = parse_advertisement_data(
+        ble_device, adv_data, SwitchbotModel.RELAY_SWITCH_1
+    )
+    assert result == SwitchBotAdvertisement(
+        address="aa:bb:cc:dd:ee:ff",
+        data={
+            "data": {
+                "switchMode": True,
+                "sequence_number": 71,
+                "isOn": True,
+            },
+            "isEncrypted": False,
+            "model": ";",
+            "modelFriendlyName": "Relay Switch 1",
+            "modelName": SwitchbotModel.RELAY_SWITCH_1,
+            "rawAdvData": b";\x00\x00\x00",
+        },
+        device=ble_device,
+        rssi=-67,
+        active=True,
+    )