diff --git a/docs/en/hat/hat-cardkb.md b/docs/en/hat/hat-cardkb.md
index 75692c9c..18427e85 100644
--- a/docs/en/hat/hat-cardkb.md
+++ b/docs/en/hat/hat-cardkb.md
@@ -22,7 +22,7 @@ The CardKB HAT also offers support for several button combinations (Shift+Key, F
 * **Fn+Key**(custom function key combination), led flashing green,keyboard will output the third key value, which you can customize based on the requirement.
 
 
-* **Double-click Shift or fn** to lock Shift(red always on) or Fn(green always on) and output the combined value multiple times.
+* **Double-click Shift or fn** to lock Shift(red always on) or Fn(green always on) and output the second value or third value multiple times.
 
 <img src="assets/img/product_pics/hat/cardkb_hat/cardkb_hat_04.jpg">
 
diff --git a/docs/zh_CN/hat/hat-cardkb.md b/docs/zh_CN/hat/hat-cardkb.md
index 7d3cd8ef..53486b2e 100644
--- a/docs/zh_CN/hat/hat-cardkb.md
+++ b/docs/zh_CN/hat/hat-cardkb.md
@@ -16,7 +16,7 @@
 
 * **按下单个按键**(蓝灯亮一次)，键盘将输出第一键值（字母键值则输出小写形式）. 例如，按下"Q"，键盘将输出"q"（小写形式）.
 
-* **双击Shift或fn**，锁定Shift（红灯常亮）或Fn（绿灯常亮），多次输出组合值
+* **双击Shift或fn**，锁定Shift（红灯常亮）或Fn（绿灯常亮），方便多次输出第二或第三键值
 
 * **Shift+key**(红灯闪烁)，键盘将输出字母的大写形式，复用按键将输出第二键值.例如，单击"Shift"后，按下"Q"，键盘将输出"Q"（大写形式）.双击"Shift"锁定功能，之后按下的任意字母按键都将输出大写形式，按下的数字和符号按键输出第二键值，再次单击"Shift"进行解锁.