diff --git a/src/numberformatbox.cpp b/src/numberformatbox.cpp
new file mode 100644
--- /dev/null
+++ b/src/numberformatbox.cpp
@@ -0,0 +1,56 @@
+/*
+  Copyright © 2016 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  serialplot is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "numberformatbox.h"
+#include "ui_numberformatbox.h"
+
+NumberFormatBox::NumberFormatBox(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::NumberFormatBox)
+{
+    ui->setupUi(this);
+
+    // setup buttons
+    buttonGroup.addButton(ui->rbUint8,  NumberFormat_uint8);
+    buttonGroup.addButton(ui->rbUint16, NumberFormat_uint16);
+    buttonGroup.addButton(ui->rbUint32, NumberFormat_uint32);
+    buttonGroup.addButton(ui->rbInt8,   NumberFormat_int8);
+    buttonGroup.addButton(ui->rbInt16,  NumberFormat_int16);
+    buttonGroup.addButton(ui->rbInt32,  NumberFormat_int32);
+    buttonGroup.addButton(ui->rbFloat,  NumberFormat_float);
+
+    QObject::connect(
+        &buttonGroup, SIGNAL(buttonToggled(int, bool)),
+        this, SLOT(onButtonToggled(int, bool)));
+}
+
+NumberFormatBox::~NumberFormatBox()
+{
+    delete ui;
+}
+
+void NumberFormatBox::onButtonToggled(int numberFormatId, bool checked)
+{
+    if (checked) emit selectionChanged((NumberFormat) numberFormatId);
+}
+
+NumberFormat NumberFormatBox::currentSelection()
+{
+    return (NumberFormat) buttonGroup.checkedId();
+}