diff --git a/docs/en/hat/hat-18650.md b/docs/en/hat/hat-18650.md
index 750fc2c7..72c14d19 100644
--- a/docs/en/hat/hat-18650.md
+++ b/docs/en/hat/hat-18650.md
@@ -11,6 +11,9 @@
 
 **18650C HAT** is a rechargeable battery base designed for M5SticKC with built-in 18650 large capacity rechargeable lithium battery.It can provide long-term endurance for the equipment. The base is designed with the plug-in structure of the HAT series, which can be used to maintain reliable connection with the M5StickC. The bottom is equipped with a USB interface charging interface, which is convenient and quick for the battery. The USB port of the battery base is only used as a charging interface, and does not have UART function.There are many types of mounting holes on the back of the base,which can be easily installed by the user into all types of planes.
 
+
+<mark>Note: The M5StickC produced after October 2019 has a new fixing hole design. If your M5StickC is an old device (no fixing hole), you cannot use screws to fix it to the 18650CHAT, but this does not affect Functional use of modules</mark>
+
 <img src="assets\img\product_pics\hat\18650C_hat\18650C_04.webp" width="30%">
 
 ## Product Features
diff --git a/docs/en/unit/pbhub.md b/docs/en/unit/pbhub.md
index a5ff0b68..3d58f886 100644
--- a/docs/en/unit/pbhub.md
+++ b/docs/en/unit/pbhub.md
@@ -81,7 +81,7 @@ See the below picture for timing sequence of HX711:
 
 <table>
     <tr>
-        <td>state</td><td>IO0 Digital Write</td><td>IO1 Digital Write</td><td>IO0 Analog Write</td><td>IO1 Analog Write</td><td>IO0 Digital Read</td><td>IO1 Digital Read</td><td>IO0 Analog Read</td><td>reserve</td><td>Set Neopixle Num</td><td>Set oneLED Color*</td><td>Set moreLED Color*</td><td>Set Brightness</td>
+        <td>state</td><td>IO0 Digital Write</td><td>IO1 Digital Write</td><td>IO0 Analog Write</td><td>IO1 Analog Write</td><td>IO0 Digital Read</td><td>IO1 Digital Read</td><td>IO0 Analog Read</td><td>reserve</td><td>Set RGB LED Num</td><td>Set oneLED Color*</td><td>Set moreLED Color*</td><td>Set Brightness</td>
     </tr>
     <tr>
         <td>r/w</td></td></td><td>w</td><td>w</td><td>w</td><td>w</td><td>r</td><td>r</td><td>r</td><td>r</td><td>w</td><td>w</td><td>w</td><td>w</td></tr>
diff --git a/docs/zh_CN/core/atom_matrix.md b/docs/zh_CN/core/atom_matrix.md
index ed773e17..ed2074f7 100644
--- a/docs/zh_CN/core/atom_matrix.md
+++ b/docs/zh_CN/core/atom_matrix.md
@@ -12,7 +12,7 @@
 支持的开发平台和程序语言：Arduino，[UIFlow](http://flow.m5stack.com) 的 Blockly 语言，Micropython. 无论你的开发和编程能力处在何种水平，M5Stack 都将协助你，逐步的将想法变为现实.
 
 <img src="assets/img/product_pics/core/minicore/atom/atom_matrix_03.webp" width="30%" height="30%">
-
+ 
 <mark>注意：RGB LED的亮度限制为20，因此请不要将其设置过高的亮度数值，以免损坏LED和亚克力屏幕。</mark>
 
 
diff --git a/docs/zh_CN/hat/hat-18650.md b/docs/zh_CN/hat/hat-18650.md
index bc7a6675..eebcc5ce 100644
--- a/docs/zh_CN/hat/hat-18650.md
+++ b/docs/zh_CN/hat/hat-18650.md
@@ -10,6 +10,7 @@
 
 **18650C HAT**是一款专为M5SticKC设计的可充电电池底座，内置18650大容量可充电锂电池，能够为设备提供较长时间的续航能力，底座沿用HAT系列的插接式结构设计，使用时能够与M5StickC保持可靠连接.底部配有USB接口充电接口，能够方便快捷的为电池充电。底座的USB接口仅作为充电接口使用，不具备串口通信功能。底座背面提供了多种类型的安装孔，用户可以非常轻易的将其安装到各类平面，电池容量为2000mAh。
 
+<mark>注意：2019年10月后生产的M5StickC背部新增了固定孔设计，若您的M5StickC为旧款设备(无固定孔)，则无法使用螺丝将其固定到18650C HAT上，但这并不影响该模块的功能使用</mark>
 
 <img src="assets\img\product_pics\hat\18650C_hat\18650C_04.webp" width="30%">
 
diff --git a/docs/zh_CN/unit/pbhub.md b/docs/zh_CN/unit/pbhub.md
index 61937088..1183997f 100644
--- a/docs/zh_CN/unit/pbhub.md
+++ b/docs/zh_CN/unit/pbhub.md
@@ -81,7 +81,7 @@ Port B 中的两条数据总线与ESP32的**GPIO36**和**GPIO26**连接,可根
 
 <table>
     <tr>
-        <td>state</td><td>IO0 Digital Write</td><td>IO1 Digital Write</td><td>IO0 Analog Write</td><td>IO1 Analog Write</td><td>IO0 Digital Read</td><td>IO1 Digital Read</td><td>IO0 Analog Read</td><td>reserve</td><td>Set Neopixle Num</td><td>Set oneLED Color*</td><td>Set moreLED Color*</td><td>Set Brightness</td>
+        <td>state</td><td>IO0 Digital Write</td><td>IO1 Digital Write</td><td>IO0 Analog Write</td><td>IO1 Analog Write</td><td>IO0 Digital Read</td><td>IO1 Digital Read</td><td>IO0 Analog Read</td><td>reserve</td><td>Set RGB LED Num</td><td>Set oneLED Color*</td><td>Set moreLED Color*</td><td>Set Brightness</td>
     </tr>
     <tr>
         <td>r/w</td></td></td><td>w</td><td>w</td><td>w</td><td>w</td><td>r</td><td>r</td><td>r</td><td>r</td><td>w</td><td>w</td><td>w</td><td>w</td></tr>