diff --git a/iot-device-power-on-and-off-data-event/src/main/java/com/qniao/iot/device/power/event/IotDevicePowerOnAndOffDataEvent.java b/iot-device-power-on-and-off-data-event/src/main/java/com/qniao/iot/device/power/event/IotDevicePowerOnAndOffDataEvent.java
index ee42fd1..d62bc2c 100644
--- a/iot-device-power-on-and-off-data-event/src/main/java/com/qniao/iot/device/power/event/IotDevicePowerOnAndOffDataEvent.java
+++ b/iot-device-power-on-and-off-data-event/src/main/java/com/qniao/iot/device/power/event/IotDevicePowerOnAndOffDataEvent.java
@@ -44,7 +44,7 @@ public class IotDevicePowerOnAndOffDataEvent implements Serializable {
     private Long currJobCount;
 
     /**
-     * 当前作业时长（开机到关机）
+     * 当前作业时长（开机到关机，单位秒）
      */
     private Long currJobDuration;