diff --git a/docs/en/base/base26.md b/docs/en/base/base26.md
index 756b1527..c5298bb1 100644
--- a/docs/en/base/base26.md
+++ b/docs/en/base/base26.md
@@ -11,7 +11,7 @@
 **Base26** is a highly customizable bottom for industrial purpose. Similar to PLC Base but higher customized level. <br>  
 Package includes protoboard which allows you to add up your own circuit design.  On the board, two Grove bonding pads are reserved. Other components come with the package is an M type waterproof joint and a TTL-to-RS485 converter board. The M type waterproof joint (M12*15)can be assembled on the side and the bottom of the Base.
 
-'26' comes from the hight of the bottom which is 26 cm.  and each side on the Base is movable, cuttable and can be customized into different Interface.  With regards to the customization of the side, we have offered plenty of structural components alternative and it is totally opensource. You can 3D print the parts and replace the side as you like.<br>
+'26' comes from the hight of the bottom which is 26 mm.  and each side on the Base is movable, cuttable and can be customized into different Interface.  With regards to the customization of the side, we have offered plenty of structural components alternative and it is totally opensource. You can 3D print the parts and replace the side as you like.<br>
 <img src="assets/img/product_pics/base/base26/base26_05.jpg" width="30%" height="30%">
 
 At the bottom side of the product, we have offered 2 different fitting ways:  Din-Rail,  Hunger. <br>
diff --git a/docs/en/unit/tof.md b/docs/en/unit/tof.md
index 6e91e733..f220e065 100644
--- a/docs/en/unit/tof.md
+++ b/docs/en/unit/tof.md
@@ -29,7 +29,7 @@ This unit comunicates with M5Core via I2C(0x29).
 - High precision
 - Measure absolute distances up to 2m
 - The wavelength of laser: 940nm
-- Program Platform: Arduino, UIFlo(Blockly, Python)
+- Program Platform: Arduino, UIFlow(Blockly, Python)
 - Two Lego-compatible holes
 - Product Size：32.2mm x 24.2mm x 8.1mm
 - Product weight：4g
diff --git a/docs/zh_CN/base/base26.md b/docs/zh_CN/base/base26.md
index 2791e2bb..6bea45d3 100644
--- a/docs/zh_CN/base/base26.md
+++ b/docs/zh_CN/base/base26.md
@@ -10,7 +10,7 @@
 
 **Base26** 是M5体系中一款支持高度定制化的工业底座.与PLC Base有着类似，却有着更高级别定制化能力.套件内提供了Protoboard（万能板）允许您添加自己的电路设计，并预留了两个Grove接口焊盘，方便您进行线路的拓展.提供了**TTL-RS485**转接板,能够方便您进行RS485类型的电平转换,配有M型防水接头组件，允许用户将其安装在底座的侧面或是底部.
 
-**Base26** 中'26'代号来源于底座的高度26cm,底座上每一侧都是可以自由拆卸，切割，定制成不同的接口，以满足不同需求.关于底座的定制，我们提供了大量的结构组件替代方案，并将其完全开源，你可以基于这些设计去制作3D打印林见或是二次设计.不但如此，该底座完全兼容M5堆叠模块与硬件拓展体系.在产品的底部，我们提供了2种不同的装配方式：导轨固定，悬挂固定。
+**Base26** 中'26'代号来源于底座的高度26mm,底座上每一侧都是可以自由拆卸，切割，定制成不同的接口，以满足不同需求.关于底座的定制，我们提供了大量的结构组件替代方案，并将其完全开源，你可以基于这些设计去制作3D打印林见或是二次设计.不但如此，该底座完全兼容M5堆叠模块与硬件拓展体系.在产品的底部，我们提供了2种不同的装配方式：导轨固定，悬挂固定。
 
 <img src="assets/img/product_pics/base/base26/base26_05.jpg" width="30%" height="30%">
 
diff --git a/docs/zh_CN/hat/hat-tof.md b/docs/zh_CN/hat/hat-tof.md
new file mode 100644
index 00000000..995d23e9
--- /dev/null
+++ b/docs/zh_CN/hat/hat-tof.md
@@ -0,0 +1,77 @@
+# ToF HAT {docsify-ignore-all}
+
+<img src="assets\img\product_pics\hat\env_hat\env_hat_01.jpg" width="30%" height="30%"><img src="assets\img\product_pics\hat\env_hat\env_hat_02.jpg" width="30%" height="30%"><img src="assets\img\product_pics\hat\env_hat\env_hat_03.jpg" width="30%" height="30%">
+
+***
+
+:memo:**[描述](#描述)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[原理图](#原理图)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[购买链接](https://m5stack.com/collections/m5-unit/products/m5stickc-env-hat)**&nbsp;&nbsp;&nbsp;<img src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/image/EasyLoader_logo-min.jpg">**[EasyLoader](#EasyLoader)**
+
+## 描述
+
+
+**ToF HAT**是一款专为M5SticKC设计的高精度激光测距传感器，内部集成ST激光测距芯片**VL53L0X**、**940nm VCSEL**发射器，通过测量激光信号到被测物体的往返时间，能够在不到30ms的时间内测量2m范围内的绝对距离.与传统测距不同的地方在于，无论检测目标的的反射率如何，它都能提供精确的距离测量数据.在一些对数据精度有一定要求的距离测量、障碍物识别项目中，**ToF HAT**能够满足你的需求.
+
+
+I2C 地址为**0x??**.(GOIO 0/26)
+
+
+## 产品特性
+
+- 高精度
+- 最大测量距离 2m
+- 940nm 激光 VCSEL 
+- 可在高红外环境光水平下运行
+- 开发平台: Arduino, UIFlow(Blockly, Python)
+- 通讯协议：I2C 
+- 安全方面：
+    - 符合最新标准的1级激光设备
+    - 标准IEC 60825-1:2014-第3版
+
+
+## 重量尺寸
+
+- 单品尺寸：58mm x 23.5mm x 1mm
+- 单品重量：2g
+
+
+## 包含
+
+- 1x ToF HAT
+
+## 应用
+
+- 障碍物识别
+- 手势识别
+- 激光测距
+- 3D结构光成像（3D感应）
+- 摄像机辅助（超快速自动对焦和景深图）
+
+## 相关链接
+
+-  **数据手册** - [VL53L0X](https://pdf1.alldatasheet.com/datasheet-pdf/view/948120/STMICROELECTRONICS/VL53L0X.html)
+
+
+## 原理图
+
+- **[原理图](https://github.com/m5stack/M5-Schematic/blob/master/Hat/StickHat_ENV.pdf)**
+
+<img src="assets\img\product_pics\hat\env_hat\env_hat_04.jpg" width="50%" height="50%">
+
+
+## EasyLoader
+
+<img src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/image/EasyLoader_logo.png" width="100px" style="margin-top:20px">
+
+<a href="https://m5stack.oss-cn-shenzhen.aliyuncs.com/EasyLoader/HAT/ENV/EasyLoader_StickC_HAT_ENV.exe"><button type="button" class="btn btn-primary">点击下载EasyLoader</button></a>
+
+>1.EasyLoader是一个简洁快速的程序烧录器，每一个产品页面里的EasyLoader都提供了一个与产品相关的案例程序，通过简单步骤将其烧录至主控，能够进行一系列的功能验证.**(目前EasyLoader仅适用于Windows操作系统)**
+
+>2.下载软件后，双击运行应用程序，将M5设备通过数据线连接至电脑,选择端口参数，点击 **"Burn"** 即可开始烧录.(**为M5StickC烧录时，请将波特率设置在750000或115200**)
+
+
+### 管脚映射
+
+<table>
+ <tr><td>M5StickC</td><td>GPIO0</td><td>GPIO26</td><td>3.3V</td><td>GND</td></tr>
+ <tr><td>ToF HAT</td><td>SCL</td><td>SDA</td><td>3.3V</td><td>GND</td></tr>
+</table>
diff --git a/docs/zh_CN/unit/tof.md b/docs/zh_CN/unit/tof.md
index a31d66ea..0ae024de 100644
--- a/docs/zh_CN/unit/tof.md
+++ b/docs/zh_CN/unit/tof.md
@@ -29,7 +29,7 @@
 - 高精度
 - 最大测量距离 2m
 - 激光波长: 940nm
-- 开发平台: Arduino, UIFlo(Blockly, Python)
+- 开发平台: Arduino, UIFlow(Blockly, Python)
 - 2x LEGO 兼容孔
 
 ## 套件清单