diff --git a/include/mynteye/api/api.h b/include/mynteye/api/api.h
index d369ecd..699247c 100644
--- a/include/mynteye/api/api.h
+++ b/include/mynteye/api/api.h
@@ -187,7 +187,10 @@ class MYNTEYE_API API {
    * Get the device info.
    */
   std::string GetInfo(const Info &info) const;
-
+  /**
+   * Get the sdk version.
+   */
+  std::string GetSDKVersion() const;
   /**
    * @deprecated Get the intrinsics (pinhole) of stream.
    */
diff --git a/include/mynteye/types.h b/include/mynteye/types.h
index 5af327e..adf52c8 100644
--- a/include/mynteye/types.h
+++ b/include/mynteye/types.h
@@ -126,8 +126,6 @@ enum class Info : std::uint8_t {
   AUXILIARY_CHIP_VERSION,
   /** Isp version */
   ISP_VERSION,
-  /** SDK version*/
-  SDK_VERSION,
   /** Last guard */
   LAST
 };
diff --git a/src/mynteye/api/api.cc b/src/mynteye/api/api.cc
index 3f034be..3f522db 100644
--- a/src/mynteye/api/api.cc
+++ b/src/mynteye/api/api.cc
@@ -328,23 +328,23 @@ std::shared_ptr<DeviceInfo> API::GetInfo() const {
 }
 
 std::string API::GetInfo(const Info &info) const {
-  if (info == Info::SDK_VERSION) {
-    std::string info_path =
-        utils::get_sdk_install_dir();
-    info_path.append(MYNTEYE_OS_SEP "share" \
-        MYNTEYE_OS_SEP "mynteye" MYNTEYE_OS_SEP "build.info");
-
-    cv::FileStorage fs(info_path, cv::FileStorage::READ);
-    if (!fs.isOpened()) {
-      LOG(WARNING) << "build.info not found: " << info_path;
-      return "null";
-    }
-    return fs["MYNTEYE_VERSION"];
-  }
-
   return device_->GetInfo(info);
 }
 
+std::string API::GetSDKVersion() const {
+  std::string info_path =
+      utils::get_sdk_install_dir();
+  info_path.append(MYNTEYE_OS_SEP "share" \
+      MYNTEYE_OS_SEP "mynteye" MYNTEYE_OS_SEP "build.info");
+
+  cv::FileStorage fs(info_path, cv::FileStorage::READ);
+  if (!fs.isOpened()) {
+    LOG(WARNING) << "build.info not found: " << info_path;
+    return "null";
+  }
+  return fs["MYNTEYE_VERSION"];
+}
+
 IntrinsicsPinhole API::GetIntrinsics(const Stream &stream) const {
   auto in = GetIntrinsicsBase(stream);
   if (in->calib_model() == CalibrationModel::PINHOLE) {
diff --git a/src/mynteye/api/synthetic.cc b/src/mynteye/api/synthetic.cc
index 9f04ff0..818dad0 100644
--- a/src/mynteye/api/synthetic.cc
+++ b/src/mynteye/api/synthetic.cc
@@ -385,8 +385,6 @@ void Synthetic::InitProcessors() {
   processors_.push_back(points_processor);
   processors_.push_back(depth_processor);
   using namespace std::placeholders;  // NOLINT
-  root_processor->SetProcessCallback(
-      std::bind(&Synthetic::OnDeviceProcess, this, _1, _2, _3));
   rectify_processor->SetProcessCallback(
       std::bind(&Synthetic::OnRectifyProcess, this, _1, _2, _3));
   disparity_processor->SetProcessCallback(
@@ -398,8 +396,6 @@ void Synthetic::InitProcessors() {
   depth_processor->SetProcessCallback(
       std::bind(&Synthetic::OnDepthProcess, this, _1, _2, _3));
 
-  root_processor->SetPostProcessCallback(
-      std::bind(&Synthetic::OnDevicePostProcess, this, _1));
   rectify_processor->SetPostProcessCallback(
       std::bind(&Synthetic::OnRectifyPostProcess, this, _1));
   disparity_processor->SetPostProcessCallback(
diff --git a/src/mynteye/api/version_checker.cc b/src/mynteye/api/version_checker.cc
index 723bbf0..d958f35 100644
--- a/src/mynteye/api/version_checker.cc
+++ b/src/mynteye/api/version_checker.cc
@@ -113,7 +113,7 @@ STATUS_UNIT checkUnit(const std::string& sdkv,
 }
 
 bool checkFirmwareVersion(const std::shared_ptr<API> api) {
-  auto sdkv = api->GetInfo(Info::SDK_VERSION);
+  auto sdkv = api->GetSDKVersion();
   auto devn = api->GetInfo(Info::DEVICE_NAME);
   auto firmv = api->GetInfo(Info::FIRMWARE_VERSION);