diff --git a/docs/accessories/dc12-60w.md b/docs/accessories/dc12-60w.md
index 8b6c2a226..7e746d062 100644
--- a/docs/accessories/dc12-60w.md
+++ b/docs/accessories/dc12-60w.md
@@ -14,6 +14,7 @@ sidebar_position: 7
 - 电源输入：100-240V ~ 50/60Hz 1.2A MAX
 - 电源输出：12V / 5A 60W
 - 具备 UL / CE / FCC 等认证
+- 极性：内正外负
 
 ## 配件清单