diff --git a/src/mynteye/api/processor/rectify_processor.cc b/src/mynteye/api/processor/rectify_processor.cc
index 3dc207f..05a1b47 100644
--- a/src/mynteye/api/processor/rectify_processor.cc
+++ b/src/mynteye/api/processor/rectify_processor.cc
@@ -281,16 +281,16 @@ std::shared_ptr<struct CameraROSMsgInfoPair> RectifyProcessor::stereoRectify(
   stereoRectify(leftOdo, rightOdo, &c_K1, &c_K2, &c_D1, &c_D2,
       image_size1, &c_R, &c_t, &c_R1, &c_R2, &c_P1, &c_P2, &T_mul_f);
 
-  // std::cout << "K1: " << K1 << std::endl;
-  // std::cout << "D1: " << D1 << std::endl;
-  // std::cout << "K2: " << K2 << std::endl;
-  // std::cout << "D2: " << D2 << std::endl;
-  // std::cout << "R: " << cv_R << std::endl;
-  // std::cout << "t: " << cv_t << std::endl;
-  // std::cout << "R1: " << R1 << std::endl;
-  // std::cout << "R2: " << R2 << std::endl;
-  // std::cout << "P1: " << P1 << std::endl;
-  // std::cout << "P2: " << P2 << std::endl;
+  VLOG(2) << "K1: " << K1 << std::endl;
+  VLOG(2) << "D1: " << D1 << std::endl;
+  VLOG(2) << "K2: " << K2 << std::endl;
+  VLOG(2) << "D2: " << D2 << std::endl;
+  VLOG(2) << "R: " << cv_R << std::endl;
+  VLOG(2) << "t: " << cv_t << std::endl;
+  VLOG(2) << "R1: " << R1 << std::endl;
+  VLOG(2) << "R2: " << R2 << std::endl;
+  VLOG(2) << "P1: " << P1 << std::endl;
+  VLOG(2) << "P2: " << P2 << std::endl;
 
   R1 = rectifyrad(R1);
   R2 = rectifyrad(R2);
diff --git a/src/mynteye/api/version_checker.cc b/src/mynteye/api/version_checker.cc
index 660b85a..1a475ed 100644
--- a/src/mynteye/api/version_checker.cc
+++ b/src/mynteye/api/version_checker.cc
@@ -26,13 +26,21 @@ typedef struct {
 }firmware_version_match_table_unit;
 
 const char* ERRO_DESCRIPTION_F =
-    "Please update the firmware at first";
+    "Please update the firmware at first;\n"
+    "Read the doc (https://mynt-eye-s-sdk.readthedocs.io/en/latest/src/firmware/applicable.html) "  // NOLINT
+    "to learn more.";
 const char* ERRO_DESCRIPTION_S =
-    "Please update the SDK at first";
+    "Please update the SDK at first;\n"
+    "Read the doc (https://mynt-eye-s-sdk.readthedocs.io/en/latest/src/firmware/applicable.html) "  // NOLINT
+    "to learn more.";
 const char* WARN_DESCRIPTION_F =
-    "We suggest that you should update the firmware";
+    "We suggest that you should update the firmware;\n"
+    "Read the doc (https://mynt-eye-s-sdk.readthedocs.io/en/latest/src/firmware/applicable.html) "  // NOLINT
+    "to learn more.";
 const char* WARN_DESCRIPTION_S =
-    "We suggest that you should update the SDK";
+    "We suggest that you should update the SDK;\n"
+    "Read the doc (https://mynt-eye-s-sdk.readthedocs.io/en/latest/src/firmware/applicable.html) "  // NOLINT
+    "to learn more.";
 const char* PASS_DESCRIPTION = "pass";
 const char* PASS_OUTOF_TABLE_WARNING = "You're using a custom mynteye device";