diff --git a/docs/_posts/2019-12-02-Profile.md b/docs/_posts/2019-12-02-Profile.md
index 1491a1bae..8f2d87363 100644
--- a/docs/_posts/2019-12-02-Profile.md
+++ b/docs/_posts/2019-12-02-Profile.md
@@ -290,7 +290,12 @@ Resumed--> Paused（被其他活动覆盖）-->Resumed（如果其他活动销
 | btBoundedDevices   | List of BluetoothDevice      | 绑定的蓝牙设备模型列表   | 无 |
 | btBoundedDeviceAddresses   | List of String      | 绑定的蓝牙设备地址列表   | 无 |
 | btBoundedDeviceAliasNames   | List of String      | 绑定的蓝牙设备Alias列表   | 无 |
-| btBoundedDeviceBatteryLevel   | List of String      | 绑定的蓝牙设备电量信息列表   | 无 |
+| btBoundedDeviceBatteryLevel   | List of Int      | 绑定的蓝牙设备电量信息列表   | 无 |
+
+补充：
+> Battery level in percents from 0 to 100, or -1 if
+     * Bluetooth is disabled, or device is disconnected, or does not have any battery reporting
+     * service, or return value is invalid
 
 示例1：
 
@@ -831,4 +836,4 @@ Thanox支持创建，导入全局变量。发布事实时，你可以用过`glob
     ]
   }
 ]
-```
\ No newline at end of file
+```