diff --git a/src/main/java/com/kimgo/wepush/model/DeviceInfoDAO.java b/src/main/java/com/kimgo/wepush/model/DeviceInfoDAO.java
index 97ccb8f..4e49afc 100644
--- a/src/main/java/com/kimgo/wepush/model/DeviceInfoDAO.java
+++ b/src/main/java/com/kimgo/wepush/model/DeviceInfoDAO.java
@@ -12,6 +12,7 @@ public class DeviceInfoDAO {
     @TableId(type = IdType.AUTO)
     private Integer id;
     private int isMonitored;
+    //设备超时时间，单位秒
     private long timeOutPeriod;
     private String deviceBrand;
     private String androidVersion;