diff --git a/app/src/main/cpp/GPIOControl.h b/app/src/main/cpp/GPIOControl.h
index dce30dba..2399ba29 100644
--- a/app/src/main/cpp/GPIOControl.h
+++ b/app/src/main/cpp/GPIOControl.h
@@ -580,6 +580,7 @@ public:
 #ifdef USING_PLZ
     PowerControl(CMD_SET_3V3_PWR_EN, CMD_SET_OTG_STATE, CMD_SET_100M_ENABLE, CMD_SET_100M_SWITCH_PWR_ENABLE, closeDelayTime)
 #else // USING_PLZ
+    // Micro Photo
     PowerControl(CMD_SET_OTG_STATE, CMD_SET_485_EN_STATE/* Only for wp6*/, closeDelayTime)
 #endif // USING_PLZ
 #endif // USING_N938