diff --git a/ubitx_20/ubitx.h b/ubitx_20/ubitx.h
index fedb46e..de44003 100644
--- a/ubitx_20/ubitx.h
+++ b/ubitx_20/ubitx.h
@@ -28,19 +28,22 @@
 //#define UBITX_DISPLAY_LCD1602I        //I2C type 16 x 02 LCD
 //#define UBITX_DISPLAY_LCD1602I_DUAL   //I2C type 16 x02 LCD Dual
 //#define UBITX_DISPLAY_LCD2004P        //24 x 04 LCD (Parallel)
-#define UBITX_DISPLAY_LCD2004I        //I2C type 24 x 04 LCD
-//#define UBITX_DISPLAY_NEXTION         //NEXTION LCD
+//#define UBITX_DISPLAY_LCD2004I        //I2C type 24 x 04 LCD
+#define UBITX_DISPLAY_NEXTION         //NEXTION LCD
 
 //#define UBITX_DISPLAY_NEXTION_SAFE      //Only EEProm Write 770~775
 #define I2C_LCD_MASTER_ADDRESS_DEFAULT  0x27     //0x27  //DEFAULT, if Set I2C Address by uBITX Manager, read from EEProm
 #define I2C_LCD_SECOND_ADDRESS_DEFAULT  0x3F     //0x27  //only using Dual LCD Mode
 
 //Select betwen Analog S-Meter and DSP (I2C) Meter
-#define USE_I2CSMETER
+//#define USE_I2CSMETER
 
 #define EXTEND_KEY_GROUP1               //MODE, BAND(-), BAND(+), STEP
 //#define EXTEND_KEY_GROUP2             //Numeric (0~9), Point(.), Enter  //Not supported in Version 1.0x
 
+//Custom LPF Filter Mod
+//#define USE_CUSTOM_LPF_FILTER           //LPF FILTER MOD
+
 //#define ENABLE_FACTORYALIGN
 #define FACTORY_RECOVERY_BOOTUP         //Whether to enter Factory Recovery mode by pressing FKey and turning on power
 #define ENABLE_ADCMONITOR               //Starting with Version 1.07, you can read ADC values directly from uBITX Manager. So this function is not necessary.
diff --git a/ubitx_20/ubitx_20.ino b/ubitx_20/ubitx_20.ino
index c9b235f..00412f1 100644
--- a/ubitx_20/ubitx_20.ino
+++ b/ubitx_20/ubitx_20.ino
@@ -6,7 +6,7 @@
 //    So I put + in the sense that it was improved one by one based on Original Firmware.
 //    This firmware has been gradually changed based on the original firmware created by Farhan, Jack, Jerry and others.
 
-#define FIRMWARE_VERSION_INFO F("+v1.097")  
+#define FIRMWARE_VERSION_INFO F("+v1.100")  
 #define FIRMWARE_VERSION_NUM 0x04       //1st Complete Project : 1 (Version 1.061), 2st Project : 2, 1.08: 3, 1.09 : 4
 
 /**
@@ -195,6 +195,13 @@ byte isIFShift = 0;     //1 = ifShift, 2 extend
 int ifShiftValue = 0;   //
 
 byte TriggerBySW = 0;   //Action Start from Nextion LCD, Other MCU
+
+//Use Custom Filter
+//#define CUST_LPF_ENABLED 48
+//#define CUST_LPF_START   49
+char isCustomFilter = 0;
+char isCustomFilter_A7 = 0;
+char CustFilters[7][2];
                               
 /**
  * Below are the basic functions that control the uBitx. Understanding the functions before 
@@ -317,7 +324,24 @@ byte delay_background(unsigned delayTime, byte fromType){ //fromType : 4 autoCWK
  */
 
 void setTXFilters(unsigned long freq){
-  
+#ifdef USE_CUSTOM_LPF_FILTER 
+  freq = freq / 1000000UL;
+  for (byte i = 0; i < 7; i++) {
+    if (freq > CustFilters[i][0])
+    {
+      char aIn = CustFilters[i][1];
+      digitalWrite(TX_LPF_A, aIn & 0x01);
+      digitalWrite(TX_LPF_B, aIn & 0x02);
+      digitalWrite(TX_LPF_C, aIn & 0x04);
+
+      if (isCustomFilter_A7 == 1)
+      {
+        digitalWrite(A7, aIn & 0x08);
+      }
+      return;
+    }
+  } //end of for
+#else
   if (freq > 21000000L){  // the default filter is with 35 MHz cut-off
     digitalWrite(TX_LPF_A, 0);
     digitalWrite(TX_LPF_B, 0);
@@ -338,6 +362,8 @@ void setTXFilters(unsigned long freq){
     digitalWrite(TX_LPF_B, 1);
     digitalWrite(TX_LPF_C, 1);    
   }
+
+#endif
 }
 
 /**
@@ -951,6 +977,24 @@ void initSettings(){
     KeyValues[i][2] = EEPROM.read(EXTENDED_KEY_RANGE + (i * 3) + 2);    //KEY TYPE 
   }
 
+#ifdef USE_CUSTOM_LPF_FILTER 
+  //Custom Filters
+  EEPROM.get(CUST_LPF_ENABLED, isCustomFilter);
+  if (isCustomFilter == 0x58)
+  {
+    isCustomFilter_A7 = 1;
+  }
+  isCustomFilter = (isCustomFilter == 0x58 || isCustomFilter == 0x57);
+  
+  for (byte i = 0; i < 7; i++) {
+    CustFilters[i][0] = EEPROM.read(CUST_LPF_START + (i * 2));        //LPF (To) Mhz
+    CustFilters[i][1] = EEPROM.read(CUST_LPF_START + (i * 2) + 1);    //Enabled I/O
+  }
+//char isCustomFilter = 0;
+//char isCustomFilter_A7 = 0;
+//char CustFilters[2][7];
+#endif
+
   //User callsign information
   if (EEPROM.read(USER_CALLSIGN_KEY) == 0x59)
     userCallsignLength = EEPROM.read(USER_CALLSIGN_LEN);  //MAXIMUM 18 LENGTH
diff --git a/ubitx_20/ubitx_eemap.h b/ubitx_20/ubitx_eemap.h
index cc37111..c86ac1d 100644
--- a/ubitx_20/ubitx_eemap.h
+++ b/ubitx_20/ubitx_eemap.h
@@ -39,6 +39,20 @@
 //==============================================================================
 #define RESERVE_FOR_FACTORY1  32
 
+//==============================================================================
+// custom LPF Filter
+// 48 : Using Custom LPF Filter  (48 = 0x57 or 0x58 => Using Custom LPF Filter, 0x58 = using A7 IO
+// 49, 50 : LPF1  (49 : MHz  (~ Mhz), 50 : Enabled PIN
+// 51, 52 : LPF2
+// 53, 54 : LPF3
+// 55, 56 : LPF4
+// 57, 58 : LPF5
+// 59, 60 : LPF6
+// 61, 62 : LPF7
+//==============================================================================
+#define CUST_LPF_ENABLED 48
+#define CUST_LPF_START   49
+
 //SI5351 I2C Address (Version 1.097)
 #define I2C_ADDR_SI5351       63
 
diff --git a/ubitx_20/ubitx_lcd_nextion.ino b/ubitx_20/ubitx_lcd_nextion.ino
index 096b86b..8cb035c 100644
--- a/ubitx_20/ubitx_lcd_nextion.ino
+++ b/ubitx_20/ubitx_lcd_nextion.ino
@@ -1041,7 +1041,7 @@ void SendUbitxData(void)
   EEPROM.get(EXTERNAL_DEVICE_OPT1, nextionDisplayOption); 
   SendCommandUL(CMD_DISP_OPTION2, nextionDisplayOption);
 
-  SendCommandStr(CMD_VERSION, (char *)("+v1.097")); //Version
+  SendCommandStr(CMD_VERSION, (char *)("+v1.100")); //Version
   SendEEPromData(CMD_CALLSIGN, 0, userCallsignLength -1, 0);
 
   /*