diff --git a/include/mynteye/types.h b/include/mynteye/types.h
index 444c80c..1f3aa98 100644
--- a/include/mynteye/types.h
+++ b/include/mynteye/types.h
@@ -165,6 +165,19 @@ enum class Source : std::uint8_t {
   LAST
 };
 
+/**
+ * @ingroup enumerations
+ * @brief Add-Ons are peripheral modules of our hardware.
+ */
+enum class AddOns : std::uint8_t {
+  /** Infrared */
+  INFRARED,
+  /** Second infrared */
+  INFRARED2,
+  /** Last guard */
+  LAST
+};
+
 #define MYNTEYE_ENUM_HELPERS(TYPE)                                       \
   MYNTEYE_API const char *to_string(const TYPE &value);                  \
   inline bool is_valid(const TYPE &value) {                              \
@@ -187,6 +200,7 @@ MYNTEYE_ENUM_HELPERS(Capabilities)
 MYNTEYE_ENUM_HELPERS(Info)
 MYNTEYE_ENUM_HELPERS(Option)
 MYNTEYE_ENUM_HELPERS(Source)
+MYNTEYE_ENUM_HELPERS(AddOns)
 
 #undef MYNTEYE_ENUM_HELPERS
 
diff --git a/src/public/types.cc b/src/public/types.cc
index ec352b0..4914705 100644
--- a/src/public/types.cc
+++ b/src/public/types.cc
@@ -122,6 +122,19 @@ const char *to_string(const Source &value) {
 #undef CASE
 }
 
+const char *to_string(const AddOns &value) {
+#define CASE(X)   \
+  case AddOns::X: \
+    return "AddOns::" #X;
+  switch (value) {
+    CASE(INFRARED)
+    CASE(INFRARED2)
+    default:
+      return "AddOns::UNKNOWN";
+  }
+#undef CASE
+}
+
 const char *to_string(const Format &value) {
 #define CASE(X)   \
   case Format::X: \
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 7e5e684..8862576 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -52,6 +52,9 @@ message(STATUS "Found mynteye: ${mynteye_VERSION}")
 
 LIST(APPEND CMAKE_MODULE_PATH ${PRO_DIR}/cmake)
 
+find_package(OpenCV REQUIRED)
+message(STATUS "Found OpenCV: ${OpenCV_VERSION}")
+
 ## gtest
 
 set(TEST_DIR ${PROJECT_SOURCE_DIR})
@@ -93,9 +96,10 @@ add_executable(${PROJECT_NAME}
   ${TEST_INTERNAL_SRC}
   ${TEST_PUBLIC_SRC}
 )
-target_link_libraries(${PROJECT_NAME} ${GTEST_LIBS} mynteye)
+target_link_libraries(${PROJECT_NAME} mynteye ${GTEST_LIBS} ${OpenCV_LIBS})
 target_create_scripts(${PROJECT_NAME} DLL_SEARCH_PATHS
   ${PRO_DIR}/_install/bin
+  ${OpenCV_LIB_SEARCH_PATH}
 )
 
 if(OS_WIN)
diff --git a/test/public/types_test.cc b/test/public/types_test.cc
index bf55b0e..e5a8f6e 100644
--- a/test/public/types_test.cc
+++ b/test/public/types_test.cc
@@ -68,6 +68,11 @@ TEST(Source, VerifyToString) {
   EXPECT_STREQ("Source::ALL", to_string(Source::ALL));
 }
 
+TEST(AddOns, VerifyToString) {
+  EXPECT_STREQ("AddOns::INFRARED", to_string(AddOns::INFRARED));
+  EXPECT_STREQ("AddOns::INFRARED2", to_string(AddOns::INFRARED2));
+}
+
 TEST(Format, VerifyToString) {
   EXPECT_STREQ("Format::GREY", to_string(Format::GREY));
   EXPECT_STREQ("Format::YUYV", to_string(Format::YUYV));