diff --git a/src/connectivity/diagnosis.cpp b/src/connectivity/diagnosis.cpp
index d7eb0ab..0931b6f 100644
--- a/src/connectivity/diagnosis.cpp
+++ b/src/connectivity/diagnosis.cpp
@@ -43,6 +43,7 @@ String Diagnosis::print_device_info()
     // Retrieve and print device information
     String device_info = "Device Information:\n";
     device_info += "Chip ID: " + String(ESP.getChipId()) + "\n";
+    device_info += "CPU frequency: " + String(ESP.getCpuFreqMHz()) + " MHz\n";
     device_info += "Flash Chip ID: " + String(ESP.getFlashChipId()) + "\n";
     device_info += "Flash Chip Size: " + String(ESP.getFlashChipSize()) + " bytes\n";
     device_info += "Free Heap Size: " + String(ESP.getFreeHeap()) + " bytes\n";