diff --git a/docs/en/unit/timercam.md b/docs/en/unit/timercam.md
index b84b5618..b60ed5cf 100644
--- a/docs/en/unit/timercam.md
+++ b/docs/en/unit/timercam.md
@@ -175,7 +175,7 @@ In sleep mode, the current consumption of the whole machine is only 2μA. After
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5stack-new-arrival/products/esp32-psram-timer-camera-ov3660';
 
    var quickstart_link = 'https://docs.m5stack.com/#/en/quick_start/timer_cam/quick_start_list';
 
diff --git a/docs/en/unit/timercam_x.md b/docs/en/unit/timercam_x.md
index 40dc89ae..e5a259f7 100644
--- a/docs/en/unit/timercam_x.md
+++ b/docs/en/unit/timercam_x.md
@@ -183,7 +183,7 @@
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5stack-new-arrival/products/esp32-psram-timer-camera-x-ov3660';
 
    var quickstart_link = 'https://docs.m5stack.com/#/en/quick_start/timer_cam/quick_start_list';
 
diff --git a/docs/zh_CN/unit/timercam.md b/docs/zh_CN/unit/timercam.md
index bad98072..113003e7 100644
--- a/docs/zh_CN/unit/timercam.md
+++ b/docs/zh_CN/unit/timercam.md
@@ -173,7 +173,7 @@
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5stack-new-arrival/products/esp32-psram-timer-camera-ov3660';
 
    var quickstart_link = 'https://docs.m5stack.com/#/en/quick_start/timer_cam/quick_start_list';
 
diff --git a/docs/zh_CN/unit/timercam_x.md b/docs/zh_CN/unit/timercam_x.md
index 61ad28b6..de9f2a01 100644
--- a/docs/zh_CN/unit/timercam_x.md
+++ b/docs/zh_CN/unit/timercam_x.md
@@ -177,7 +177,7 @@
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5stack-new-arrival/products/esp32-psram-timer-camera-x-ov3660';
 
    var quickstart_link = 'https://docs.m5stack.com/#/en/quick_start/timer_cam/quick_start_list';