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 b2d7d9a..df308a9 100644
--- a/app/src/main/java/com/nbee/echolink/model/DeviceInfo.java
+++ b/app/src/main/java/com/nbee/echolink/model/DeviceInfo.java
@@ -4,16 +4,16 @@ public class DeviceInfo {
     private String deviceBrand;
     private String deviceModel;
     private String androidVersion;
-    private String SN;
+    private String sn;
 
     public DeviceInfo() {
     }
 
-    public DeviceInfo(String deviceBrand, String deviceModel, String androidVersion,String SN) {
+    public DeviceInfo(String deviceBrand, String deviceModel, String androidVersion,String sn) {
         this.deviceBrand = deviceBrand;
         this.deviceModel = deviceModel;
         this.androidVersion = androidVersion;
-        this.SN = SN;
+        this.sn = sn;
     }
 
     public String getDeviceBrand() {
@@ -40,12 +40,12 @@ public class DeviceInfo {
         this.androidVersion = androidVersion;
     }
 
-    public String getSN() {
-        return SN;
+    public String getSn() {
+        return sn;
     }
 
-    public void setSN(String SN) {
-        this.SN = SN;
+    public void setSn(String sn) {
+        this.sn = sn;
     }
 
     @Override
@@ -54,7 +54,7 @@ public class DeviceInfo {
                 "deviceBrand='" + deviceBrand + '\'' +
                 ", deviceModel='" + deviceModel + '\'' +
                 ", androidVersion='" + androidVersion + '\'' +
-                ", SN='" + SN + '\'' +
+                ", SN='" + sn + '\'' +
                 '}';
     }
 }