diff --git a/docs/en/unit/heart.md b/docs/en/unit/heart.md
index 9c6e4840..7fb169c6 100644
--- a/docs/en/unit/heart.md
+++ b/docs/en/unit/heart.md
@@ -14,7 +14,7 @@ MAX30100 is a complete pulse oximetry and heartrate sensor system solution desig
 **Put your finger on the detection area.**
 
 - What is the communication  protocol between M5 core and this unit?
-**I2C**.
+**I2C(0x57)**.
 
 ## Product Features
 
diff --git a/docs/zh_CN/unit/heart.md b/docs/zh_CN/unit/heart.md
index e202a3c7..411b3b77 100644
--- a/docs/zh_CN/unit/heart.md
+++ b/docs/zh_CN/unit/heart.md
@@ -5,7 +5,7 @@
 
 ## 描述
 
-**HEART** 是一款血氧心率传感器.集成**MAX30110**，提供完整的脉搏血氧仪和心率传感器系统解决方案.这是一款非插入式的血氧心率传感器,集成了两个红外发光二极管和一个光检测器.其检测原理是通过红外 led 灯照射，检测携带氧气和非携带氧气的红血球数量比例，从而得到血氧含量.
+**HEART** 是一款血氧心率传感器.集成**MAX30100**，提供完整的脉搏血氧仪和心率传感器系统解决方案.这是一款非插入式的血氧心率传感器,集成了两个红外发光二极管和一个光检测器.其检测原理是通过红外 led 灯照射，检测携带氧气和非携带氧气的红血球数量比例，从而得到血氧含量.
 
 **测试方式: 程序运行后，将手指放置在检测区域.**