diff --git a/domain/src/main/java/com/foke/together/domain/input/SetExternalCameraIPInterface.kt b/domain/src/main/java/com/foke/together/domain/input/SetExternalCameraIPInterface.kt
new file mode 100644
index 0000000..c404c41
--- /dev/null
+++ b/domain/src/main/java/com/foke/together/domain/input/SetExternalCameraIPInterface.kt
@@ -0,0 +1,7 @@
+package com.foke.together.domain.input
+
+import com.foke.together.domain.interactor.entity.ExternalCameraIP
+
+interface SetExternalCameraIPInterface {
+    suspend operator fun invoke(externalCameraIP: ExternalCameraIP)
+}
\ No newline at end of file
diff --git a/domain/src/main/java/com/foke/together/domain/interactor/GetExternalCameraIPUseCase.kt b/domain/src/main/java/com/foke/together/domain/interactor/GetExternalCameraIPUseCase.kt
index f014776..0e23fd8 100644
--- a/domain/src/main/java/com/foke/together/domain/interactor/GetExternalCameraIPUseCase.kt
+++ b/domain/src/main/java/com/foke/together/domain/interactor/GetExternalCameraIPUseCase.kt
@@ -11,7 +11,7 @@ import javax.inject.Inject
 class GetExternalCameraIPUseCase @Inject constructor(
     private val appPreference: AppPreferenceInterface
 ): GetExternalCameraIPInterface {
-    override fun invoke(): Flow<ExternalCameraIP> =
+    override operator fun invoke(): Flow<ExternalCameraIP> =
         appPreference.getExternalCameraIP().map { it }
 }
 
diff --git a/domain/src/main/java/com/foke/together/domain/interactor/SetExternalCameraIPUseCase.kt b/domain/src/main/java/com/foke/together/domain/interactor/SetExternalCameraIPUseCase.kt
new file mode 100644
index 0000000..f60f960
--- /dev/null
+++ b/domain/src/main/java/com/foke/together/domain/interactor/SetExternalCameraIPUseCase.kt
@@ -0,0 +1,16 @@
+package com.foke.together.domain.interactor
+
+
+import com.foke.together.domain.input.SetExternalCameraIPInterface
+import com.foke.together.domain.interactor.entity.ExternalCameraIP
+import com.foke.together.domain.output.AppPreferenceInterface
+import javax.inject.Inject
+
+class SetExternalCameraIPUseCase @Inject constructor(
+    private val appPreference: AppPreferenceInterface
+): SetExternalCameraIPInterface {
+    override suspend operator fun invoke(externalCameraIP: ExternalCameraIP)=
+        appPreference.setExternalCameraIP(externalCameraIP)
+}
+
+