diff --git a/consoleEmulator.pro b/ConsoleEmulatorAddProbes.pro
similarity index 100%
rename from consoleEmulator.pro
rename to ConsoleEmulatorAddProbes.pro
diff --git a/logic/include/model/ButtonHelper.h b/logic/include/model/ButtonHelper.h
index 98cb5df..a85ade7 100644
--- a/logic/include/model/ButtonHelper.h
+++ b/logic/include/model/ButtonHelper.h
@@ -2,79 +2,101 @@
 #define BUTTONHELPER_H
 
 #define PUSH_BUTTON(CAPITAL_NAME, SMALL_NAME, FUNC_CODE, LED_FUNC_CODE) \
-    private:    \
+private:    \
     PushButton _ ## SMALL_NAME{FUNC_CODE, LED_FUNC_CODE}; \
     void init ## CAPITAL_NAME()    \
     {   \
-    connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData);\
-    connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, SIGNAL(SMALL_NAME ## LedChanged(char)));\
+        connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
+        connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, \
+                SIGNAL(SMALL_NAME ## LedChanged(char))); \
     } \
-    public: \
+public: \
     void press ## CAPITAL_NAME()    \
     {   \
-    auto arr = _ ## SMALL_NAME.press(); \
-    _dataSender->send(arr); \
+        auto arr = _ ## SMALL_NAME.press(); \
+        _dataSender->send(arr); \
     } \
     void release ## CAPITAL_NAME()  \
     {     \
-    auto arr = _ ## SMALL_NAME.release(); \
-    _dataSender->send(arr); \
+        auto arr = _ ## SMALL_NAME.release(); \
+        _dataSender->send(arr); \
     } \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
 
 /*************************************************************************************************/
 #define PUSH_BUTTON_NO_LED(CAPITAL_NAME, SMALL_NAME, FUNC_CODE) \
-    private:    \
+private:    \
     PushButton _ ## SMALL_NAME{FUNC_CODE}; \
     void init ## CAPITAL_NAME()    \
     {   \
-    connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData);\
-    connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, SIGNAL(SMALL_NAME ## LedChanged(char)));\
+        connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
+        connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, \
+                SIGNAL(SMALL_NAME ## LedChanged(char))); \
     } \
-    public: \
+public: \
     void press ## CAPITAL_NAME()    \
     {   \
-    auto arr = _ ## SMALL_NAME.press(); \
-    _dataSender->send(arr); \
+        auto arr = _ ## SMALL_NAME.press(); \
+        _dataSender->send(arr); \
     } \
     void release ## CAPITAL_NAME()  \
     {   \
-    auto arr = _ ## SMALL_NAME.release(); \
-    _dataSender->send(arr); \
+        auto arr = _ ## SMALL_NAME.release(); \
+        _dataSender->send(arr); \
     } \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
 
 /*************************************************************************************************/
 #define ROTARY_BUTTON(CAPITAL_NAME, SMALL_NAME, FUNC_CODE, LED_FUNC_CODE) \
-    private:    \
+private:    \
     RotaryButton _ ## SMALL_NAME{FUNC_CODE, LED_FUNC_CODE}; \
     void init ## CAPITAL_NAME()    \
     {   \
-    connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData);\
-    connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, SIGNAL(SMALL_NAME ## LedChanged(char)));\
+        connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
+        connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, \
+                SIGNAL(SMALL_NAME ## LedChanged(char))); \
     } \
-    public: \
+public: \
     void rotate ## CAPITAL_NAME(int value)    \
     {   \
-    auto arr = _ ## SMALL_NAME.rotate(value); \
-    _dataSender->send(arr); \
+        auto arr = _ ## SMALL_NAME.rotate(value); \
+        _dataSender->send(arr); \
     } \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
 
 /*************************************************************************************************/
 #define ROTARY_BUTTON_NO_LED(CAPITAL_NAME, SMALL_NAME, FUNC_CODE) \
-    private:    \
+private:    \
     RotaryButton _ ## SMALL_NAME{FUNC_CODE}; \
     void init ## CAPITAL_NAME()    \
     {   \
-    connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData);\
-    connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, SIGNAL(SMALL_NAME ## LedChanged(char)));\
+        connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
+        connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, \
+                SIGNAL(SMALL_NAME ## LedChanged(char))); \
     } \
-    public: \
+public: \
     void rotate ## CAPITAL_NAME(int value)    \
     {   \
-    auto arr = _ ## SMALL_NAME.rotate(value); \
-    _dataSender->send(arr); \
+        auto arr = _ ## SMALL_NAME.rotate(value); \
+        _dataSender->send(arr); \
+    } \
+    Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
+
+/*************************************************************************************************/
+#define DROP_DOWN(CAPITAL_NAME, SMALL_NAME, FUNC_CODE, LED_FUNC_CODE) \
+private:    \
+    DropDown _ ## SMALL_NAME{FUNC_CODE, LED_FUNC_CODE}; \
+    void init ## CAPITAL_NAME()    \
+    {   \
+        connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
+        connect(_ ## SMALL_NAME.getLed(), SIGNAL(ledChanged(char)), this, \
+                SIGNAL(SMALL_NAME ## LedChanged(char))); \
+    } \
+public: \
+    void select ## CAPITAL_NAME(int value)    \
+    {   \
+        auto arr = _ ## SMALL_NAME.select(value); \
+        _dataSender->send(arr); \
     } \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
 
diff --git a/logic/include/model/Console.h b/logic/include/model/Console.h
index 0bbd51e..4846fc0 100644
--- a/logic/include/model/Console.h
+++ b/logic/include/model/Console.h
@@ -14,6 +14,7 @@
 #include "FunctionCodes.h"
 #include "PushButton.h"
 #include "RotaryButton.h"
+#include "DropDown.h"
 
 #include "DataSender.h"
 #include "Logger.h"
@@ -22,6 +23,12 @@ class Console : public QObject
 {
 	Q_OBJECT
 
+    //Slotes
+    DROP_DOWN(Slot1, slot1, SLOT1_FC, static_cast<char>(SLOT1_LED_FC));
+    DROP_DOWN(Slot2, slot2, SLOT2_FC, static_cast<char>(SLOT2_LED_FC));
+    DROP_DOWN(Slot3, slot3, SLOT3_FC, static_cast<char>(SLOT3_LED_FC));
+    DROP_DOWN(Slot4, slot4, SLOT4_FC, static_cast<char>(SLOT4_LED_FC));
+
 	//PushButton with LED
 	PUSH_BUTTON(Dual, dual, DUAL_FC, static_cast<char>(DUAL_LED_FC));
 	PUSH_BUTTON(Quad, quad, QUAD_FC, static_cast<char>(QUAD_LED_FC));
diff --git a/logic/include/model/DropDown.h b/logic/include/model/DropDown.h
new file mode 100644
index 0000000..7415fe1
--- /dev/null
+++ b/logic/include/model/DropDown.h
@@ -0,0 +1,29 @@
+#ifndef DropDown_H
+#define DropDown_H
+
+#define PROTOCOL_LENGTH 8
+#define MESSAGE_DIRECTION 0x00
+#define DropDownDataLength 0x02
+#define DropDownType 0x03
+#define ProbA 0x00
+#define ProbB 0x01
+#define ProbNC 0x02
+#define TIME_TAG 0x00
+
+#include "Led.h"
+
+class DropDown
+{
+private:
+	char _functionCode;
+	Led _led;
+
+public:
+    DropDown(char functionCode);
+    DropDown(char functionCode, char ledFunctionCode);
+
+    Led* getLed();
+    QByteArray select(int value);
+};
+
+#endif //DropDown_H
diff --git a/logic/include/model/FunctionCodes.h b/logic/include/model/FunctionCodes.h
index ac2dd94..cfad5dc 100644
--- a/logic/include/model/FunctionCodes.h
+++ b/logic/include/model/FunctionCodes.h
@@ -1,6 +1,16 @@
 #ifndef FUNCTIONCODES_H
 #define FUNCTIONCODES_H
 
+//Probes and LED of probes
+#define SLOT1_FC 0x01
+#define SLOT2_FC 0x09
+#define SLOT3_FC 0x19
+#define SLOT4_FC 0x18
+#define SLOT1_LED_FC 0x20
+#define SLOT2_LED_FC 0x27
+#define SLOT3_LED_FC 0x30
+#define SLOT4_LED_FC 0x48
+
 //Buttons
 #define DUAL_FC 0x1D
 #define QUAD_FC 0x1C
diff --git a/logic/include/viewModel/MainViewModel.h b/logic/include/viewModel/MainViewModel.h
index 6dc7ed9..5cacb67 100644
--- a/logic/include/viewModel/MainViewModel.h
+++ b/logic/include/viewModel/MainViewModel.h
@@ -19,6 +19,12 @@ class MainViewModel : public QtMvvm::ViewModel
 	MVVM_PROPERTY(int, stepInc, 1)
 	MVVM_PROPERTY(int, stepDec, -1)
 
+    //Slots
+    DROP_DOWN_PROPERTY(slot1, Slot1, LED_OFF)
+    DROP_DOWN_PROPERTY(slot2, Slot2, LED_OFF)
+    DROP_DOWN_PROPERTY(slot3, Slot3, LED_OFF)
+    DROP_DOWN_PROPERTY(slot4, Slot4, LED_OFF)
+
 	//Top Left
     BUTTON_LED_PROPERTY(patient, Patient, false, LED_OFF)
     BUTTON_LED_PROPERTY(utils, Utils, false, LED_COLOR_WHITE)
@@ -144,6 +150,12 @@ signals:
 
 //uncrustify off
 public slots:
+    //Probes
+//    LED_SLOT(slot1)
+//    LED_SLOT(slot2)
+//    LED_SLOT(slot3)
+//    LED_SLOT(slot4)
+
 	//Top Left
 	LED_SLOT(patient)
 	LED_SLOT(utils)
diff --git a/logic/include/viewModel/utils/Property.h b/logic/include/viewModel/utils/Property.h
index c6c861a..459de35 100644
--- a/logic/include/viewModel/utils/Property.h
+++ b/logic/include/viewModel/utils/Property.h
@@ -77,6 +77,16 @@
 			NAME ## Led(static_cast<int>(value)); \
 		} \
 
+/**************************************************************************************************/
+#define DROP_DOWN_PROPERTY(NAME, CAP_NAME, LED_DEF_VAL) \
+    MVVM_PROPERTY_CUSTOM(bool, NAME, false) \
+    void NAME ## Handle() { \
+        if(NAME()) \
+        { \
+            panel->select ## CAP_NAME('stepDec()'); \
+        } \
+    } \
+
 //uncrustify on
 
 #endif //PROPERTY_H
diff --git a/logic/logic.pro b/logic/logic.pro
index 80531c3..eef9d5b 100644
--- a/logic/logic.pro
+++ b/logic/logic.pro
@@ -8,9 +8,11 @@ TARGET = logic
 
 DEFINES += QT_DEPRECATED_WARNINGS
 
-SOURCES += $$files(src/*.cpp, true)
+SOURCES += $$files(src/*.cpp, true) \
+    src/model/DropDown.cpp
 
-HEADERS += $$files(include/*.h, true)
+HEADERS += $$files(include/*.h, true) \
+    include/model/DropDown.h
 
 INCLUDEPATH += $$PWD/include/
 
diff --git a/logic/src/model/Console.cpp b/logic/src/model/Console.cpp
index 72c5ac7..3f26475 100644
--- a/logic/src/model/Console.cpp
+++ b/logic/src/model/Console.cpp
@@ -84,6 +84,11 @@ bool Console::isEchoPacket(const QByteArray& data)
 /*************************************************************************************************/
 void Console::initializeButtons()
 {
+    initSlot1();
+    initSlot2();
+    initSlot3();
+    initSlot4();
+
     initDual();
     initQuad();
     initSingle();
diff --git a/logic/src/model/DropDown.cpp b/logic/src/model/DropDown.cpp
new file mode 100644
index 0000000..a453977
--- /dev/null
+++ b/logic/src/model/DropDown.cpp
@@ -0,0 +1,38 @@
+#include "model/DropDown.h"
+
+/*************************************************************************************************/
+DropDown::DropDown(char functionCode)
+{
+    _functionCode = functionCode;
+}
+
+/*************************************************************************************************/
+DropDown::DropDown(char functionCode, char ledFunctionCode) :
+    _led(ledFunctionCode)
+{
+    _functionCode = functionCode;
+}
+
+/*************************************************************************************************/
+Led* DropDown::getLed()
+{
+    return &_led;
+}
+
+/*************************************************************************************************/
+QByteArray DropDown::select(int value)
+{
+    QByteArray arr;
+
+    arr.resize(PROTOCOL_LENGTH);
+    arr[0] = MESSAGE_DIRECTION;
+    arr[1] = DropDownDataLength;
+    arr[2] = DropDownType;
+    arr[3] = _functionCode;
+    arr[4] = static_cast<char>(value >> PROTOCOL_LENGTH);
+    arr[5] = static_cast<char>(value);
+    arr[6] = TIME_TAG;
+    arr[7] = TIME_TAG;
+
+    return arr;
+}
diff --git a/logic/src/viewModel/MainViewModel.cpp b/logic/src/viewModel/MainViewModel.cpp
index 0b3c689..71601d7 100644
--- a/logic/src/viewModel/MainViewModel.cpp
+++ b/logic/src/viewModel/MainViewModel.cpp
@@ -20,6 +20,12 @@ MainViewModel::MainViewModel(QObject* parent) :
 
     connect(network, &UdpDataSender::dataReady, panel, &Console::newData);
 
+    //Add Probes in 4 Slots
+//CONNECT_LED(slot1)
+//CONNECT_LED(slot2)
+//CONNECT_LED(slot3)
+//CONNECT_LED(slot4)
+
 	//Top Left
 	CONNECT_LED(patient)
 	CONNECT_LED(utils)