diff --git a/Window Tool/TimeSet/.vs/TimeSet/v15/.suo b/Window Tool/TimeSet/.vs/TimeSet/v15/.suo
index 6e6ba91..017fca3 100644
Binary files a/Window Tool/TimeSet/.vs/TimeSet/v15/.suo and b/Window Tool/TimeSet/.vs/TimeSet/v15/.suo differ
diff --git a/Window Tool/TimeSet/Debug/TimeSet.exe b/Window Tool/TimeSet/Debug/Co2_Time_MaxMin_Setting.exe
similarity index 65%
rename from Window Tool/TimeSet/Debug/TimeSet.exe
rename to Window Tool/TimeSet/Debug/Co2_Time_MaxMin_Setting.exe
index 55a8041..5bedf2b 100644
Binary files a/Window Tool/TimeSet/Debug/TimeSet.exe and b/Window Tool/TimeSet/Debug/Co2_Time_MaxMin_Setting.exe differ
diff --git a/Window Tool/TimeSet/Debug/TimeSet.ilk b/Window Tool/TimeSet/Debug/TimeSet.ilk
index c05de5f..1850a66 100644
Binary files a/Window Tool/TimeSet/Debug/TimeSet.ilk and b/Window Tool/TimeSet/Debug/TimeSet.ilk differ
diff --git a/Window Tool/TimeSet/Debug/TimeSet.pdb b/Window Tool/TimeSet/Debug/TimeSet.pdb
index 1ef21bb..0696d68 100644
Binary files a/Window Tool/TimeSet/Debug/TimeSet.pdb and b/Window Tool/TimeSet/Debug/TimeSet.pdb differ
diff --git a/Window Tool/TimeSet/TimeSet/TimeSet.aps b/Window Tool/TimeSet/TimeSet/TimeSet.aps
index 9fb6560..2646c3a 100644
Binary files a/Window Tool/TimeSet/TimeSet/TimeSet.aps and b/Window Tool/TimeSet/TimeSet/TimeSet.aps differ
diff --git a/Window Tool/TimeSet/TimeSet/TimeSet.rc b/Window Tool/TimeSet/TimeSet/TimeSet.rc
index 328b096..347e609 100644
Binary files a/Window Tool/TimeSet/TimeSet/TimeSet.rc and b/Window Tool/TimeSet/TimeSet/TimeSet.rc differ
diff --git a/Window Tool/TimeSet/TimeSet/TimeSetDlg.cpp b/Window Tool/TimeSet/TimeSet/TimeSetDlg.cpp
index ff28b86..3920067 100644
--- a/Window Tool/TimeSet/TimeSet/TimeSetDlg.cpp	
+++ b/Window Tool/TimeSet/TimeSet/TimeSetDlg.cpp	
@@ -139,6 +139,7 @@ BEGIN_MESSAGE_MAP(CTimeSetDlg, CDialogEx)
 	ON_BN_CLICKED(IDC_BUTTON_CONNECT, &CTimeSetDlg::OnBnClickedButtonConnect)
 	ON_BN_CLICKED(IDC_BUTTON_SET_LOCAL_TIME, &CTimeSetDlg::OnBnClickedButtonSetLocalTime)
 	ON_BN_CLICKED(IDC_BUTTON_SET_USER_TIME, &CTimeSetDlg::OnBnClickedButtonSetUserTime)
+	ON_BN_CLICKED(IDC_BUTTON_SET_THRESHOLD, &CTimeSetDlg::OnBnClickedButtonSetThreshold)
 END_MESSAGE_MAP()
 
 
@@ -448,6 +449,7 @@ void CTimeSetDlg::OnBnClickedButtonConnect()
 		GetDlgItem(IDC_COMBO_SERIAL_LIST)->EnableWindow(true);
 		GetDlgItem(IDC_BUTTON_SET_LOCAL_TIME)->EnableWindow(false);
 		GetDlgItem(IDC_BUTTON_SET_USER_TIME)->EnableWindow(false);
+		GetDlgItem(IDC_BUTTON_SET_THRESHOLD)->EnableWindow(false);
 	}
 	else
 	{
@@ -506,6 +508,9 @@ void CTimeSetDlg::OnBnClickedButtonConnect()
 			GetDlgItem(IDC_COMBO_SERIAL_LIST)->EnableWindow(false);
 			GetDlgItem(IDC_BUTTON_SET_LOCAL_TIME)->EnableWindow(true);
 			GetDlgItem(IDC_BUTTON_SET_USER_TIME)->EnableWindow(true);
+
+			GetDlgItem(IDC_BUTTON_SET_THRESHOLD)->EnableWindow(true);
+
 		}
 
 
@@ -623,3 +628,57 @@ void CTimeSetDlg::OnBnClickedButtonSetUserTime()
 	}
 
 }
+
+
+void CTimeSetDlg::OnBnClickedButtonSetThreshold()
+{
+	// TODO: 여기에 컨트롤 알림 처리기 코드를 추가합니다.
+	// TODO: 여기에 컨트롤 알림 처리기 코드를 추가합니다.
+	// TODO: 여기에 컨트롤 알림 처리기 코드를 추가합니다.
+	uint8_t TxData[100];
+	uint8_t TxIndex = 0;
+	uint16_t MaxData;
+	uint16_t MinData;
+	uint8_t i;
+	uint8_t checksum = 0;
+
+	TxData[TxIndex++] = 0x02;
+	TxData[TxIndex++] = 0x01;
+	TxData[TxIndex++] = 0x04;
+
+	CString strtemp;
+
+	GetDlgItem(IDC_EDIT_CO2_MAX)->GetWindowText(strtemp);
+	MaxData = atoi(strtemp);
+	TxData[TxIndex++] = (MaxData >> 8) & 0xFF;
+	TxData[TxIndex++] = (MaxData >> 0) & 0xFF;
+
+	GetDlgItem(IDC_EDIT_CO2_MIN)->GetWindowText(strtemp);
+	MinData = atoi(strtemp);
+	TxData[TxIndex++] = (MinData >> 8) & 0xFF;
+	TxData[TxIndex++] = (MinData >> 0) & 0xFF;
+
+	if (MaxData <= MinData)
+	{
+		MessageBox("Max / Min settings are incorrect.\r\nThe Max value must be greater than the Min value.", NULL, MB_ICONERROR);
+		return;
+	}
+
+
+
+	checksum = 0;
+
+	for (i = 0; i < TxIndex; i++)
+	{
+		checksum += TxData[i];
+	}
+
+
+	TxData[TxIndex++] = checksum;
+	TxData[TxIndex++] = 0x03;
+
+	if (m_Serial.IsOpen())
+	{
+		m_Serial.Write(TxData, TxIndex);
+	}
+}
diff --git a/Window Tool/TimeSet/TimeSet/TimeSetDlg.h b/Window Tool/TimeSet/TimeSet/TimeSetDlg.h
index 3c27728..b7874c7 100644
--- a/Window Tool/TimeSet/TimeSet/TimeSetDlg.h	
+++ b/Window Tool/TimeSet/TimeSet/TimeSetDlg.h	
@@ -60,4 +60,5 @@ public:
 	afx_msg void OnBnClickedButtonConnect();
 	afx_msg void OnBnClickedButtonSetLocalTime();
 	afx_msg void OnBnClickedButtonSetUserTime();
+	afx_msg void OnBnClickedButtonSetThreshold();
 };
diff --git a/Window Tool/TimeSet/TimeSet/resource.h b/Window Tool/TimeSet/TimeSet/resource.h
index 5601592..8ac6fbf 100644
--- a/Window Tool/TimeSet/TimeSet/resource.h	
+++ b/Window Tool/TimeSet/TimeSet/resource.h	
@@ -14,6 +14,9 @@
 #define IDC_EDIT_SEC                    1008
 #define IDC_BUTTON_SET_USER_TIME        1009
 #define IDC_BUTTON_SET_LOCAL_TIME       1010
+#define IDC_EDIT_CO2_MIN                1011
+#define IDC_EDIT_CO2_MAX                1012
+#define IDC_BUTTON_SET_THRESHOLD        1013
 
 // Next default values for new objects
 // 
@@ -21,7 +24,7 @@
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        130
 #define _APS_NEXT_COMMAND_VALUE         32771
-#define _APS_NEXT_CONTROL_VALUE         1010
+#define _APS_NEXT_CONTROL_VALUE         1012
 #define _APS_NEXT_SYMED_VALUE           101
 #endif
 #endif