diff --git a/apps/abstraction/main.py b/apps/abstraction/main.py
index 8d86b5b..4e86f7d 100644
--- a/apps/abstraction/main.py
+++ b/apps/abstraction/main.py
@@ -15,7 +15,7 @@ import uuid
 from aiomqtt import Client
 from pydantic import ValidationError
 
-from packages.home_capabilities import LightState, ThermostatState, ContactState, TempHumidityState, RelayState, ThreePhasePowerState
+from packages.home_capabilities import LightState, ThermostatState, ContactState, TempHumidityState, RelayState, ThreePhasePowerState, SwitchState
 from apps.abstraction.transformation import (
     transform_abstract_to_vendor,
     transform_vendor_to_abstract
@@ -174,6 +174,10 @@ async def handle_abstract_set(
             # Contact sensors are read-only - SET commands should not occur
             logger.warning(f"Contact sensor {device_id} received SET command - ignoring (read-only device)")
             return
+        elif device_type == "switch":
+            # Switches are read-only - SET commands should not occur
+            logger.warning(f"Switch {device_id} received SET command - ignoring (read-only device)")
+            return
     except ValidationError as e:
         logger.error(f"Validation failed for {device_type} SET {device_id}: {e}")
         return
@@ -227,6 +231,9 @@ async def handle_vendor_state(
         elif device_type == "three_phase_powermeter":
             # Validate three-phase powermeter state
             ThreePhasePowerState.model_validate(abstract_payload)
+        elif device_type == "switch":
+            # Validate switch state
+            SwitchState.model_validate(abstract_payload)
     except ValidationError as e:
         logger.error(f"Validation failed for {device_type} STATE {device_id}: {e}")
         return
diff --git a/apps/abstraction/vendors/zigbee2mqtt.py b/apps/abstraction/vendors/zigbee2mqtt.py
index 5ebc7ed..b86d92b 100644
--- a/apps/abstraction/vendors/zigbee2mqtt.py
+++ b/apps/abstraction/vendors/zigbee2mqtt.py
@@ -161,6 +161,24 @@ def transform_temp_humidity_sensor_to_abstract(payload: str) -> dict[str, Any]:
     return payload
 
 
+def transform_switch_to_vendor(payload: dict[str, Any]) -> str:
+    """Transform abstract switch payload to zigbee2mqtt format.
+    
+    Switches are read-only, so this should not be called for SET commands.
+    """
+    logger.warning("Switches are read-only - SET commands should not be used")
+    return json.dumps(payload)
+
+
+def transform_switch_to_abstract(payload: str) -> dict[str, Any]:
+    """Transform zigbee2mqtt switch payload to abstract format.
+    
+    Passthrough - zigbee2mqtt provides action, battery, linkquality directly.
+    """
+    payload = json.loads(payload)
+    return payload
+
+
 def transform_relay_to_vendor(payload: dict[str, Any]) -> str:
     """Transform abstract relay payload to zigbee2mqtt format.
     
@@ -204,6 +222,8 @@ HANDLERS = {
     ("temp_humidity_sensor", "to_abstract"): transform_temp_humidity_sensor_to_abstract,
     ("temp_humidity", "to_vendor"): transform_temp_humidity_sensor_to_vendor,
     ("temp_humidity", "to_abstract"): transform_temp_humidity_sensor_to_abstract,
+    ("switch", "to_vendor"): transform_switch_to_vendor,
+    ("switch", "to_abstract"): transform_switch_to_abstract,
     ("relay", "to_vendor"): transform_relay_to_vendor,
     ("relay", "to_abstract"): transform_relay_to_abstract,
 }
diff --git a/packages/home_capabilities/__init__.py b/packages/home_capabilities/__init__.py
index ede6c72..cf3707e 100644
--- a/packages/home_capabilities/__init__.py
+++ b/packages/home_capabilities/__init__.py
@@ -8,6 +8,8 @@ from packages.home_capabilities.contact_sensor import CAP_VERSION as CONTACT_SEN
 from packages.home_capabilities.contact_sensor import ContactState
 from packages.home_capabilities.temp_humidity_sensor import CAP_VERSION as TEMP_HUMIDITY_SENSOR_VERSION
 from packages.home_capabilities.temp_humidity_sensor import TempHumidityState
+from packages.home_capabilities.switch import CAP_VERSION as SWITCH_VERSION
+from packages.home_capabilities.switch import SwitchState
 from packages.home_capabilities.relay import CAP_VERSION as RELAY_VERSION
 from packages.home_capabilities.relay import RelayState
 from packages.home_capabilities.three_phase_powermeter import CAP_VERSION as THREE_PHASE_POWERMETER_VERSION
@@ -42,6 +44,8 @@ __all__ = [
     "CONTACT_SENSOR_VERSION",
     "TempHumidityState",
     "TEMP_HUMIDITY_SENSOR_VERSION",
+    "SwitchState",
+    "SWITCH_VERSION",
     "RelayState",
     "RELAY_VERSION",
     "DeviceTile",
diff --git a/packages/home_capabilities/switch.py b/packages/home_capabilities/switch.py
new file mode 100644
index 0000000..2f51f8d
--- /dev/null
+++ b/packages/home_capabilities/switch.py
@@ -0,0 +1,69 @@
+"""Switch Capability - Wireless Button/Switch (read-only).
+
+This module defines the SwitchState model for wireless switches/buttons.
+These devices report action events (e.g., button presses) and are read-only devices.
+
+Capability Version: switch@1.0.0
+"""
+
+from datetime import datetime
+from typing import Annotated
+
+from pydantic import BaseModel, Field
+
+
+# Capability metadata
+CAP_VERSION = "switch@1.0.0"
+DISPLAY_NAME = "Switch"
+
+
+class SwitchState(BaseModel):
+    """State model for wireless switches/buttons.
+    
+    Wireless switches are read-only devices that report button actions such as
+    single press, double press, long press, etc. They typically also report 
+    battery level and signal quality.
+    
+    Attributes:
+        action: Action type (e.g., "single", "double", "long", "hold", etc.)
+        battery: Battery level percentage (0-100), optional
+        linkquality: MQTT link quality indicator, optional
+        voltage: Battery voltage in mV, optional
+        ts: Timestamp of the action event, optional
+    
+    Examples:
+        >>> SwitchState(action="single")
+        SwitchState(action='single', battery=None, ...)
+        
+        >>> SwitchState(action="double", battery=95, linkquality=87)
+        SwitchState(action='double', battery=95, linkquality=87, ...)
+    """
+    
+    action: str = Field(
+        ...,
+        description="Action type: 'single', 'double', 'long', 'hold', etc."
+    )
+    
+    battery: Annotated[int, Field(ge=0, le=100)] | None = Field(
+        None,
+        description="Battery level in percent (0-100)"
+    )
+    
+    linkquality: int | None = Field(
+        None,
+        description="Link quality indicator (typically 0-255)"
+    )
+    
+    voltage: int | None = Field(
+        None,
+        description="Battery voltage in millivolts"
+    )
+    
+    ts: datetime | None = Field(
+        None,
+        description="Timestamp of the action event"
+    )
+
+
+# Public API
+__all__ = ["SwitchState", "CAP_VERSION", "DISPLAY_NAME"]