diff --git a/docs/src/firmware/applicable.rst b/docs/src/firmware/applicable.rst
index 29d91d4..a4f4849 100644
--- a/docs/src/firmware/applicable.rst
+++ b/docs/src/firmware/applicable.rst
@@ -28,6 +28,6 @@ MYNTEYE_S2100_1.1.img            2.3.4
 .. attention::
   Please CONFIRM your device model and use CORRECT firmware.
 
-``Firmwares`` indicates the firmware file name. It's in `MYNTEYE_BOX <http://doc.myntai.com/mynteye/s/download>`_ in the ``Firmwares`` directory.
+``Firmwares`` indicates the firmware file name. It's in `MYNTEYE_BOX(Download Link) <http://doc.myntai.com/mynteye/s/download>`_ in the ``Firmwares`` directory.
 
 ``SDK Version`` indicates the version of the SDK that the firmware is adapted to, and the range of available versions are indicated in parentheses.
diff --git a/docs/src/firmware/stm_update.rst b/docs/src/firmware/stm_update.rst
index add2a21..e10b966 100644
--- a/docs/src/firmware/stm_update.rst
+++ b/docs/src/firmware/stm_update.rst
@@ -3,8 +3,8 @@
 How to upgrade the auxiliary chip
 ==================================
 
-Update auxiliary chip
-----------------------
+Update auxiliary chip(Only Support S2100)
+------------------------------------------
 
 * Plug in the MYNT® EYE camera into a USB3.0 port
 
diff --git a/docs/src/firmware/upgrade.rst b/docs/src/firmware/upgrade.rst
index 7af7391..aa6eb2e 100644
--- a/docs/src/firmware/upgrade.rst
+++ b/docs/src/firmware/upgrade.rst
@@ -5,7 +5,7 @@ How to upgrade the firmware
 
 Please use the MYNT EYE TOOL to upgrade the firmware.
 
-You can download the firmware and MYNT EYE TOOL installation package in the ``Firmwares`` folder of `MYNTEYE_BOX <http://www.myntai.com/mynteye/s/download>`_ . The file structure is as follows:
+You can download the firmware and MYNT EYE TOOL installation package in the ``Firmwares`` folder of `MYNTEYE_BOX(Download Link) <http://www.myntai.com/mynteye/s/download>`_ . The file structure is as follows:
 
 .. code-block:: none