diff --git a/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IHasWirelessSharing.cs b/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IHasWirelessSharing.cs
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index 00000000..bf7562fc
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+++ b/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IHasWirelessSharing.cs
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+using System;
+
+namespace PepperDash.Essentials.Core.DeviceTypeInterfaces;
+
+/// <summary>
+/// Defines the contract for a wireless presentation endpoint that reports whether a wireless
+/// sharing session is currently active. Implemented by platforms such as Crestron AirMedia,
+/// Mersive Solstice, Barco ClickShare, Miracast/Teams receivers, etc. Allows consumers (e.g.
+/// room plugins) to react to wireless sharing activity without taking a dependency on any
+/// concrete device implementation.
+/// </summary>
+/// <remarks>
+/// This refers specifically to wireless screen/device mirroring, as distinct from in-call
+/// content sharing on a video conference.
+/// </remarks>
+public interface IHasWirelessSharing
+{
+    /// <summary>
+    /// Reports whether a wireless sharing session is currently active (content is being presented).
+    /// </summary>
+    BoolFeedback IsSharingFeedback { get; }
+
+    /// <summary>
+    /// Raised when wireless sharing starts or stops. The event args carry the new sharing state.
+    /// </summary>
+    event EventHandler<WirelessSharingEventArgs> SharingChanged;
+}
+
+/// <summary>
+/// Event arguments describing a change in wireless sharing state.
+/// </summary>
+public class WirelessSharingEventArgs : EventArgs
+{
+    /// <summary>
+    /// True if a wireless sharing session is active (content is being presented), false otherwise.
+    /// </summary>
+    public bool IsSharing { get; private set; }
+
+    /// <summary>
+    /// Creates a new <see cref="WirelessSharingEventArgs"/>.
+    /// </summary>
+    /// <param name="isSharing">True if a wireless sharing session is active, false otherwise.</param>
+    public WirelessSharingEventArgs(bool isSharing)
+    {
+        IsSharing = isSharing;
+    }
+}