diff --git a/docs/rock5/rock5b/hardware-design/hardware-interface.md b/docs/rock5/rock5b/hardware-design/hardware-interface.md
index d7c490a21..d7baed335 100644
--- a/docs/rock5/rock5b/hardware-design/hardware-interface.md
+++ b/docs/rock5/rock5b/hardware-design/hardware-interface.md
@@ -107,7 +107,7 @@ description: "详细介绍 ROCK 5B/5B+ 硬件信息"
 | GPIO       | 电压 | 最高  |
 | ---------- | ---- | ----- |
 | 所有的GPIO | 3.3V | 3.63V |
-| SARADC_IN4 | 3.3V | 1.8V  |
+| SARADC_IN4 | 1.8V | 1.98V |
 
 - GPIO Pinout
 
diff --git a/i18n/en/docusaurus-plugin-content-docs/current/rock5/rock5b/hardware-design/hardware-interface.md b/i18n/en/docusaurus-plugin-content-docs/current/rock5/rock5b/hardware-design/hardware-interface.md
index 3d64d19bf..fb2a89797 100644
--- a/i18n/en/docusaurus-plugin-content-docs/current/rock5/rock5b/hardware-design/hardware-interface.md
+++ b/i18n/en/docusaurus-plugin-content-docs/current/rock5/rock5b/hardware-design/hardware-interface.md
@@ -107,7 +107,7 @@ description: "Detailed hardware information for ROCK 5B/5B+"
 | GPIO       | Voltage | MAX   |
 | ---------- | ------- | ----- |
 | All GPIO   | 3.3V    | 3.63V |
-| SARADC_IN4 | 3.3V    | 1.8V  |
+| SARADC_IN4 | 1.8V    | 1.98V |
 
 - GPIO Pinout