diff --git a/docs/assets/img/product_pics/core/basic/ip5306_cn.png b/docs/assets/img/product_pics/core/basic/ip5306_cn.png
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diff --git a/docs/assets/img/product_pics/core/basic/ip5306_en.png b/docs/assets/img/product_pics/core/basic/ip5306_en.png
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diff --git a/docs/en/app/ac_socket.md b/docs/en/app/ac_socket.md
index b2aae89e..9186a9a1 100644
--- a/docs/en/app/ac_socket.md
+++ b/docs/en/app/ac_socket.md
@@ -32,6 +32,7 @@ Let's break it down a little bit, start with the bottom part.
 
 ## Product Features
 - RS485 OUTLET
+- Serial communication protocol: ModBUS-RTU
 - support Mutiple device Series connection 
 - STM32F030F4
 - Embedded 4x M3 Nut
diff --git a/docs/zh_CN/app/ac_socket.md b/docs/zh_CN/app/ac_socket.md
index 72c1e84a..4b7343b0 100644
--- a/docs/zh_CN/app/ac_socket.md
+++ b/docs/zh_CN/app/ac_socket.md
@@ -34,6 +34,7 @@
 ## 产品特性
 
 - RS485 接口
+- 串行通信协议:ModBUS-RTU
 - 支持多个设备串行连接
 - 内置STM32F030F4
 - 采用BASE26底座