diff --git a/docs/API_reference/zh/btlib/bt.md b/docs/API_reference/zh/btlib/bt.md
index d44c57c01d642d1fdd632efc9c5023e348cd3489..3049b34a5727960fae404a50b3786201a490a253 100644
--- a/docs/API_reference/zh/btlib/bt.md
+++ b/docs/API_reference/zh/btlib/bt.md
@@ -6,7 +6,7 @@
 
 见github：https://github.com/QuecPython/example_BT
 
-> 当前仅EC200U/EC600U/EG915U/EG912U型号支持`bt`功能。
+> 当前仅EC200U/EC600U/EG912U/EG915ULA_AB型号支持`bt`功能。