diff --git a/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_1.launch b/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_1.launch
index f3aa75e..b5c14bd 100644
--- a/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_1.launch
+++ b/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_1.launch
@@ -7,7 +7,7 @@
 
   <!-- serial_number -->
   <!-- if is_mutiple is true, must set serial_number -->
-  <arg name="serial_number" default="07C42B1B0009071F" />
+  <arg name="serial_number" default="[wait to input target device1 SN here]" />
 
   <!-- depth_type  0: MONO16, 1: TYPE_16UC1 -->
   <arg name="depth_type" default="0" />
diff --git a/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_2.launch b/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_2.launch
index 39e7cd4..fb27f00 100644
--- a/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_2.launch
+++ b/wrappers/ros/src/mynt_eye_ros_wrapper/launch/sub/mynteye_2.launch
@@ -7,7 +7,7 @@
 
   <!-- serial_number -->
   <!-- if is_mutiple is true, must set serial_number -->
-  <arg name="serial_number" default="07C4061B0009071F" />
+  <arg name="serial_number" default="[wait to input target device2 SN here]" />
 
   <!-- depth_type  0: MONO16, 1: TYPE_16UC1 -->
   <arg name="depth_type" default="0" />