diff --git a/app/src/main/java/com/nbee/echolink/model/DeviceInfo.java b/app/src/main/java/com/nbee/echolink/model/DeviceInfo.java
index b383391..b2d7d9a 100644
--- a/app/src/main/java/com/nbee/echolink/model/DeviceInfo.java
+++ b/app/src/main/java/com/nbee/echolink/model/DeviceInfo.java
@@ -4,14 +4,16 @@ public class DeviceInfo {
     private String deviceBrand;
     private String deviceModel;
     private String androidVersion;
+    private String SN;
 
     public DeviceInfo() {
     }
 
-    public DeviceInfo(String deviceBrand, String deviceModel, String androidVersion) {
+    public DeviceInfo(String deviceBrand, String deviceModel, String androidVersion,String SN) {
         this.deviceBrand = deviceBrand;
         this.deviceModel = deviceModel;
         this.androidVersion = androidVersion;
+        this.SN = SN;
     }
 
     public String getDeviceBrand() {
@@ -38,12 +40,21 @@ public class DeviceInfo {
         this.androidVersion = androidVersion;
     }
 
+    public String getSN() {
+        return SN;
+    }
+
+    public void setSN(String SN) {
+        this.SN = SN;
+    }
+
     @Override
     public String toString() {
         return "DeviceInfo{" +
                 "deviceBrand='" + deviceBrand + '\'' +
                 ", deviceModel='" + deviceModel + '\'' +
                 ", androidVersion='" + androidVersion + '\'' +
+                ", SN='" + SN + '\'' +
                 '}';
     }
 }