diff --git a/docs/assets/img/product_pics/unit/envII/envII_sch.webp b/docs/assets/img/product_pics/unit/envII/envII_sch.webp
new file mode 100644
index 00000000..0451835b
Binary files /dev/null and b/docs/assets/img/product_pics/unit/envII/envII_sch.webp differ
diff --git a/docs/en/app/balac.md b/docs/en/app/balac.md
index 035b2c0b..fab0c7c8 100644
--- a/docs/en/app/balac.md
+++ b/docs/en/app/balac.md
@@ -110,8 +110,6 @@ Click here to download [UIFlow](https://github.com/m5stack/M5-ProductExampleCode
 <video class="video_size" controls>
     <source src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/video/Product_example_video/App/BalaC.mp4" type="video/mp4">
 </video>
-<script>
-
 
 
 <script>
diff --git a/docs/en/unit/envII.md b/docs/en/unit/envII.md
index 77c5eb72..bc6bd768 100644
--- a/docs/en/unit/envII.md
+++ b/docs/en/unit/envII.md
@@ -73,6 +73,36 @@ Supporting I2C interface, SHT30 is a digital temperature and humidity sensor wit
      </tbody>
 </table>
 
+
+## Comparison between SHT30 and DHT12
+
+<table class="table-1">
+    <thead>
+    <tr>
+        <th>/</th>
+        <th>SHT30</th>
+        <th>DHT12</th>
+    </tr>
+    </thead>
+    <tbody>
+        <tr>
+            <td>Max temperature measuring range</td>
+            <td>-40 ~ 120 ℃</td>
+            <td>-20 ~ 60 ℃</td>
+        </tr>
+        <tr>
+            <td>Typical temperature resolution</td>
+            <td>0 ~ 60 ℃/±0.2℃</td>
+            <td>±0.2℃</td>
+        </tr>
+        <tr>
+            <td>Humidity measuring range/resolution</td>
+            <td>10 ~ 90 %RH / ±2%</td>
+            <td>20 ~ 95 %RH/0.1%</td>
+        </tr>
+     </tbody>
+</table>
+
 <!--
 <table>
    <tr style="font-weight:bold">
diff --git a/docs/zh_CN/unit/envII.md b/docs/zh_CN/unit/envII.md
index 2e480711..6bfc3266 100644
--- a/docs/zh_CN/unit/envII.md
+++ b/docs/zh_CN/unit/envII.md
@@ -77,6 +77,35 @@
      </tbody>
 </table>
 
+## SHT30与DHT12对比
+
+<table class="table-1">
+    <thead>
+    <tr>
+        <th>/</th>
+        <th>SHT30</th>
+        <th>DHT12</th>
+    </tr>
+    </thead>
+    <tbody>
+        <tr>
+            <td>最大温度测量范围</td>
+            <td>-40 ~ 120 ℃</td>
+            <td>-20 ~ 60 ℃</td>
+        </tr>
+        <tr>
+            <td>温度测量误差</td>
+            <td>0 ~ 60 ℃/±0.2℃</td>
+            <td>±0.2℃</td>
+        </tr>
+        <tr>
+            <td>湿度测量范围/误差</td>
+            <td>10 ~ 90 %RH / ±2%</td>
+            <td>20 ~ 95 %RH/0.1%</td>
+        </tr>
+     </tbody>
+</table>
+
 ## EasyLoader
 
 >EasyLoader是一个简洁快速的程序烧录器，其内置了一个产品相关的案例程序，通过简单步骤将其烧录至主控，即可进行一系列的功能验证.**(程序烧录前，请根据设备类型安装相应驱动程序. M5Core型主机[请点击此处查看CP210X驱动安装教程](zh_CN/arduino/arduino_development?id=安装串口驱动)，M5StickC/V/T/ATOM系列可免驱动使用)**