diff --git a/src/device/interfaces/get.device.interface.ts b/src/device/interfaces/get.device.interface.ts
index d7c856b..30f57f8 100644
--- a/src/device/interfaces/get.device.interface.ts
+++ b/src/device/interfaces/get.device.interface.ts
@@ -1,17 +1,17 @@
-export class GetDeviceDetailsInterface {
+export interface GetDeviceDetailsInterface {
   result: {
     productId: string;
   };
   success: boolean;
   msg: string;
 }
-export class GetDevicesByRoomIdInterface {
+export interface GetDevicesByRoomIdInterface {
   success: boolean;
   msg: string;
   result: [];
 }
 
-export class GetDevicesByGroupIdInterface {
+export interface GetDevicesByGroupIdInterface {
   success: boolean;
   msg: string;
   result: {
@@ -20,18 +20,18 @@ export class GetDevicesByGroupIdInterface {
   };
 }
 
-export class addDeviceInRoomInterface {
+export interface addDeviceInRoomInterface {
   success: boolean;
   msg: string;
   result: boolean;
 }
 
-export class controlDeviceInterface {
+export interface controlDeviceInterface {
   success: boolean;
   result: boolean;
   msg: string;
 }
-export class GetDeviceDetailsFunctionsInterface {
+export interface GetDeviceDetailsFunctionsInterface {
   result: {
     category: string;
     functions: [];
@@ -39,7 +39,7 @@ export class GetDeviceDetailsFunctionsInterface {
   success: boolean;
   msg: string;
 }
-export class GetDeviceDetailsFunctionsStatusInterface {
+export interface GetDeviceDetailsFunctionsStatusInterface {
   result: [{ id: string; status: [] }];
   success: boolean;
   msg: string;