diff --git a/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IHasWirelessSharing.cs b/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IHasWirelessSharing.cs
new file mode 100644
index 00000000..6cd3835e
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+++ b/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IHasWirelessSharing.cs
@@ -0,0 +1,48 @@
+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;
+        }
+    }
+}