diff --git a/docs/en/unit/esp32cam.md b/docs/en/unit/esp32cam.md
index 06f9777d..07d1b79f 100644
--- a/docs/en/unit/esp32cam.md
+++ b/docs/en/unit/esp32cam.md
@@ -126,9 +126,13 @@ Because the module can generate WIFI hotspot AP, So you can use your mobile phon
1. **Camera Power Down** pin does not need to be connected to ESP32 GPIO. Instead it may be pulled down to ground with 10 kOhm resistor.
-2. We have several kinds of camera boards, the following figures show the main differece with them. If you want the detailed defference with them, please click [here](https://shimo.im/sheets/gP96C8YTdyjGgKQC).
+2. We have several kinds of camera boards, the following figures show the main differece with them.
-
+ If you want to **view** the detailed defference with them, please click [here](https://shimo.im/sheets/gP96C8YTdyjGgKQC).
+
+ If you want to **download** the detailed defference with them, please click [here](https://github.com/m5stack/M5-Schematic/blob/master/Units/m5camera/M5%20Camera%20Detailed%20Comparison.xlsx).
+
+
## Related Link
diff --git a/docs/en/unit/m5camera.md b/docs/en/unit/m5camera.md
index 49bf31e8..43930fb0 100644
--- a/docs/en/unit/m5camera.md
+++ b/docs/en/unit/m5camera.md
@@ -138,9 +138,12 @@ This Unit reserves the weld of the 9-axis gyroscope (MPU6050), Temperature and h
1. **Camera Power Down** pin does not need to be connected to ESP32 GPIO. Instead it may be pulled down to ground with 10 kOhm resistor.
-2. We have several kinds of camera boards, the following figures show the main differece with them. If you want the detailed defference with them, please click [here](https://shimo.im/sheets/gP96C8YTdyjGgKQC).
+2. We have several kinds of camera boards, the following figures show the main differece with them.
+ If you want to **view** the detailed defference with them, please click [here](https://shimo.im/sheets/gP96C8YTdyjGgKQC).
-
+ If you want to **download** the detailed defference with them, please click [here](https://github.com/m5stack/M5-Schematic/blob/master/Units/m5camera/M5%20Camera%20Detailed%20Comparison.xlsx).
+
+
## Related Link
diff --git a/docs/en/unit/m5camera_f.md b/docs/en/unit/m5camera_f.md
index ead7be78..dee96410 100644
--- a/docs/en/unit/m5camera_f.md
+++ b/docs/en/unit/m5camera_f.md
@@ -134,9 +134,13 @@ This Unit reserves the weld of the 9-axis gyroscope (MPU6050), Temperature and h
1. **Camera Power Down** pin does not need to be connected to ESP32 GPIO. Instead it may be pulled down to ground with 10 kOhm resistor.
-2. We have several kinds of camera boards, the following figures show the main differece with them. If you want the detailed defference with them, please click [here](https://shimo.im/sheets/gP96C8YTdyjGgKQC).
+2. We have several kinds of camera boards, the following figures show the main differece with them.
-
+ If you want to **view** the detailed defference with them, please click [here](https://shimo.im/sheets/gP96C8YTdyjGgKQC).
+
+ If you want to **download** the detailed defference with them, please click [here](https://github.com/m5stack/M5-Schematic/blob/master/Units/m5camera/M5%20Camera%20Detailed%20Comparison.xlsx).
+
+
## Related Link
diff --git a/docs/zh_CN/unit/esp32cam.md b/docs/zh_CN/unit/esp32cam.md
index 5f9b48bd..976db0a1 100644
--- a/docs/zh_CN/unit/esp32cam.md
+++ b/docs/zh_CN/unit/esp32cam.md
@@ -125,9 +125,13 @@
1. **Camera Power Down 引脚** 没必要连接到 ESP32 的引脚。
-2. 我们有几个版本的摄像头板子,下图是它们主要区别的比较,如果想查看详细的资源对比,请点击[这里](https://shimo.im/sheets/gP96C8YTdyjGgKQC/e2041)。
+2. 我们有几个版本的摄像头板子,下图是它们主要区别的比较。
-
+ 如果想**查看**详细的资源对比,请点击[这里](https://shimo.im/sheets/gP96C8YTdyjGgKQC/e2041)。
+
+ 如果想**下载**详细的资源对比,请点击[这里](https://github.com/m5stack/M5-Schematic/blob/master/Units/m5camera/M5%20Camera%20Detailed%20Comparison.xlsx)。
+
+
## 相关链接
diff --git a/docs/zh_CN/unit/m5camera_f.md b/docs/zh_CN/unit/m5camera_f.md
index 6517a73d..3970b75a 100644
--- a/docs/zh_CN/unit/m5camera_f.md
+++ b/docs/zh_CN/unit/m5camera_f.md
@@ -142,9 +142,13 @@
1. **Camera Power Down 引脚** 没必要连接到 ESP32 的引脚。
-2. 我们有几个版本的摄像头板子,下图是它们主要区别的比较,如果想查看详细的资源对比,请点击[这里](https://shimo.im/sheets/gP96C8YTdyjGgKQC/e2041)。
+2. 我们有几个版本的摄像头板子,下图是它们主要区别的比较。
-
+ 如果想**查看**详细的资源对比,请点击[这里](https://shimo.im/sheets/gP96C8YTdyjGgKQC/e2041)。
+
+ 如果想**下载**详细的资源对比,请点击[这里](https://github.com/m5stack/M5-Schematic/blob/master/Units/m5camera/M5%20Camera%20Detailed%20Comparison.xlsx)。
+
+
diff --git a/docs/zh_CN/unit/m5camera_x.md b/docs/zh_CN/unit/m5camera_x.md
index 8ad15c95..d84c33a5 100644
--- a/docs/zh_CN/unit/m5camera_x.md
+++ b/docs/zh_CN/unit/m5camera_x.md
@@ -144,9 +144,13 @@
1. **Camera Power Down 引脚** 没必要连接到 ESP32 的引脚。
-2. 我们有几个版本的摄像头板子,下图是它们主要区别的比较,如果想查看详细的资源对比,请点击[这里](https://shimo.im/sheets/gP96C8YTdyjGgKQC/e2041)。
+2. 我们有几个版本的摄像头板子,下图是它们主要区别的比较。
-
+ 如果想**查看**详细的资源对比,请点击[这里](https://shimo.im/sheets/gP96C8YTdyjGgKQC/e2041)。
+
+ 如果想**下载**详细的资源对比,请点击[这里](https://github.com/m5stack/M5-Schematic/blob/master/Units/m5camera/M5%20Camera%20Detailed%20Comparison.xlsx)。
+
+