diff --git a/src/constants.h b/src/constants.h
index a82f568..fbbe727 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -107,7 +107,7 @@
 
 // EEPROM index defines
 #define EE_PRESETS_CNT              99
-#define EE_CHECKBYTE_VALUE          36 // 0 ~ 255,add new entry, change for new value
+#define EE_CHECKBYTE_VALUE          2 // 0 ~ 255,add new entry, change for new value
 
 #define EE_TOTAL_CNT                821
 #define EE_UINT16_FREQUENCY_FM      0
@@ -191,7 +191,7 @@
 #define EE_PRESET_BW_START			224
 #define EE_PRESET_MS_START			324
 #define EE_PRESETS_START            424
-#define EE_PRESETS_FREQUENCY        10800
+#define EE_PRESETS_FREQUENCY        0
 
 // End of EEPROM index defines