diff --git a/README.md b/README.md
index 5bf175b..47b3bdb 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ It's based on [android.widget.NumberPicker](https://android.googlesource.com/pla
 - Customizable fonts(color, size, typeface)
 - Customizable dividers(color, distance, thickness)
 - Horizontal and Vertical mode are both supported
+- Ascending and Descending order are both supported
 - Also supports the negative values
 
 ## Usage
@@ -70,9 +71,9 @@ add `xmlns:app="http://schemas.android.com/apk/res-auto"`
     app:np_max="59"
     app:np_min="0"
     app:np_selectedTextColor="@color/colorPrimary"
+    app:np_selectedTextSize="@dimen/selected_text_size"
     app:np_textColor="@color/colorPrimary"
     app:np_textSize="@dimen/text_size"
-    app:np_selectedTextSize="@dimen/selected_text_size"
     app:np_typeface="@string/roboto_light"
     app:np_value="3" />
 ```
@@ -89,11 +90,12 @@ add `xmlns:app="http://schemas.android.com/apk/res-auto"`
 |np_formatter|The formatter of the numbers.|
 |np_max|The max value of this widget.|
 |np_min|The min value of this widget.|
+|np_order|The order of this widget. Default is ascending.|
 |np_orientation|The orientation of this widget. Default is vertical.|
 |np_selectedTextColor|The text color of the selected number.|
+|np_selectedTextSize|The text size of the selected number.|
 |np_textColor|The text color of the numbers.|
 |np_textSize|The text size of the numbers.|
-|np_selectedTextSize|The text size of the selected number.|
 |np_typeface|The typeface of the numbers.|
 |np_value|The current value of this widget.|
 |np_wheelItemCount|The number of items show in the selector wheel.|
@@ -111,7 +113,7 @@ buildscript {
 }
 
 dependencies {
-    compile 'com.shawnlin:number-picker:2.4.3'
+    compile 'com.shawnlin:number-picker:2.4.4'
 }
 ```
 
diff --git a/gradle.properties b/gradle.properties
index 65c7309..d5f6af6 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
-VERSION_CODE=11
-VERSION_NAME=2.4.3
+VERSION_CODE=12
+VERSION_NAME=2.4.4
 
 GROUP=com.shawnlin
 ARTIFACT_ID=number-picker
diff --git a/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java b/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java
index 74663d0..bb84486 100644
--- a/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java
+++ b/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java
@@ -51,9 +51,15 @@ public class NumberPicker extends LinearLayout {
     public @interface Orientation{}
 
     public static final int VERTICAL = LinearLayout.VERTICAL;
-
     public static final int HORIZONTAL = LinearLayout.HORIZONTAL;
 
+    @Retention(SOURCE)
+    @IntDef({ASCENDING, DESCENDING})
+    public @interface Order{}
+
+    public static final int ASCENDING = 0;
+    public static final int DESCENDING = 1;
+
     /**
      * The default update interval during long press.
      */
@@ -94,6 +100,11 @@ public class NumberPicker extends LinearLayout {
      */
     private static final int SIZE_UNSPECIFIED = -1;
 
+    /**
+     * The default color of divider.
+     */
+    private static final int DEFAULT_DIVIDER_COLOR = 0xFF000000;
+
     /**
      * The default max value of this widget.
      */
@@ -403,7 +414,7 @@ public static final Formatter getTwoDigitFormatter() {
     /**
      * The color of the selection divider.
      */
-    private int mSelectionDividerColor;
+    private int mSelectionDividerColor = DEFAULT_DIVIDER_COLOR;
 
     /**
      * The distance between the two selection dividers.
@@ -460,6 +471,11 @@ public static final Formatter getTwoDigitFormatter() {
      */
     private int mOrientation;
 
+    /**
+     * The order of this widget.
+     */
+    private int mOrder;
+
     /**
      * The context of this widget.
      */
@@ -574,6 +590,7 @@ public NumberPicker(Context context, AttributeSet attrs, int defStyle) {
         mSelectionDividerThickness = attributesArray.getDimensionPixelSize(
                 R.styleable.NumberPicker_np_dividerThickness, defSelectionDividerThickness);
 
+        mOrder = attributesArray.getInt(R.styleable.NumberPicker_np_order, ASCENDING);
         mOrientation = attributesArray.getInt(R.styleable.NumberPicker_np_orientation, VERTICAL);
 
         mWidth = attributesArray.getDimensionPixelSize(R.styleable.NumberPicker_np_width, SIZE_UNSPECIFIED);
@@ -588,9 +605,9 @@ public NumberPicker(Context context, AttributeSet attrs, int defStyle) {
         mMinValue = attributesArray.getInt(R.styleable.NumberPicker_np_min, mMinValue);
 
         mSelectedTextColor = attributesArray.getColor(R.styleable.NumberPicker_np_selectedTextColor, mSelectedTextColor);
+        mSelectedTextSize = attributesArray.getDimension(R.styleable.NumberPicker_np_selectedTextSize, spToPx(mSelectedTextSize));
         mTextColor = attributesArray.getColor(R.styleable.NumberPicker_np_textColor, mTextColor);
         mTextSize = attributesArray.getDimension(R.styleable.NumberPicker_np_textSize, spToPx(mTextSize));
-        mSelectedTextSize = attributesArray.getDimension(R.styleable.NumberPicker_np_selectedTextSize, spToPx(mSelectedTextSize));
         mTypeface = Typeface.create(attributesArray.getString(R.styleable.NumberPicker_np_typeface), Typeface.NORMAL);
         mFormatter = stringToFormatter(attributesArray.getString(R.styleable.NumberPicker_np_formatter));
         mWheelItemCount = attributesArray.getInt(R.styleable.NumberPicker_np_wheelItemCount, mWheelItemCount);
@@ -1003,32 +1020,58 @@ public void setEnabled(boolean enabled) {
 
     @Override
     public void scrollBy(int x, int y) {
-        int[] selectorIndices = mSelectorIndices;
+        int[] selectorIndices = getSelectorIndices();
         int gap;
         if (isHorizontalMode()) {
-            if (!mWrapSelectorWheel && x > 0
-                && selectorIndices[mWheelMiddleItemIndex] <= mMinValue) {
-                mCurrentScrollOffset = mInitialScrollOffset;
-                return;
-            }
-            if (!mWrapSelectorWheel && x < 0
-                && selectorIndices[mWheelMiddleItemIndex] >= mMaxValue) {
-                mCurrentScrollOffset = mInitialScrollOffset;
-                return;
+            if (isAscendingOrder()) {
+                if (!mWrapSelectorWheel && x > 0
+                    && selectorIndices[mWheelMiddleItemIndex] <= mMinValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
+                if (!mWrapSelectorWheel && x < 0
+                    && selectorIndices[mWheelMiddleItemIndex] >= mMaxValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
+            } else {
+                if (!mWrapSelectorWheel && x > 0
+                    && selectorIndices[mWheelMiddleItemIndex] >= mMaxValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
+                if (!mWrapSelectorWheel && x < 0
+                    && selectorIndices[mWheelMiddleItemIndex] <= mMinValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
             }
 
             mCurrentScrollOffset += x;
             gap = mSelectorTextGapWidth;
         } else {
-            if (!mWrapSelectorWheel && y > 0
-                && selectorIndices[mWheelMiddleItemIndex] <= mMinValue) {
-                mCurrentScrollOffset = mInitialScrollOffset;
-                return;
-            }
-            if (!mWrapSelectorWheel && y < 0
-                && selectorIndices[mWheelMiddleItemIndex] >= mMaxValue) {
-                mCurrentScrollOffset = mInitialScrollOffset;
-                return;
+            if (isAscendingOrder()) {
+                if (!mWrapSelectorWheel && y > 0
+                    && selectorIndices[mWheelMiddleItemIndex] <= mMinValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
+                if (!mWrapSelectorWheel && y < 0
+                    && selectorIndices[mWheelMiddleItemIndex] >= mMaxValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
+            } else {
+                if (!mWrapSelectorWheel && y > 0
+                    && selectorIndices[mWheelMiddleItemIndex] >= mMaxValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
+                if (!mWrapSelectorWheel && y < 0
+                    && selectorIndices[mWheelMiddleItemIndex] <= mMinValue) {
+                    mCurrentScrollOffset = mInitialScrollOffset;
+                    return;
+                }
             }
 
             mCurrentScrollOffset += y;
@@ -1037,7 +1080,11 @@ public void scrollBy(int x, int y) {
 
         while (mCurrentScrollOffset - mInitialScrollOffset > gap) {
             mCurrentScrollOffset -= mSelectorElementSize;
-            decrementSelectorIndices(selectorIndices);
+            if (isAscendingOrder()) {
+                decrementSelectorIndices(selectorIndices);
+            } else {
+                incrementSelectorIndices(selectorIndices);
+            }
             setValueInternal(selectorIndices[mWheelMiddleItemIndex], true);
             if (!mWrapSelectorWheel && selectorIndices[mWheelMiddleItemIndex] < mMinValue) {
                 mCurrentScrollOffset = mInitialScrollOffset;
@@ -1045,7 +1092,11 @@ public void scrollBy(int x, int y) {
         }
         while (mCurrentScrollOffset - mInitialScrollOffset < -gap) {
             mCurrentScrollOffset += mSelectorElementSize;
-            incrementSelectorIndices(selectorIndices);
+            if (isAscendingOrder()) {
+                incrementSelectorIndices(selectorIndices);
+            } else {
+                decrementSelectorIndices(selectorIndices);
+            }
             setValueInternal(selectorIndices[mWheelMiddleItemIndex], true);
             if (!mWrapSelectorWheel && selectorIndices[mWheelMiddleItemIndex] > mMaxValue) {
                 mCurrentScrollOffset = mInitialScrollOffset;
@@ -1369,7 +1420,7 @@ protected void onDraw(Canvas canvas) {
         }
 
         // draw the selector wheel
-        int[] selectorIndices = mSelectorIndices;
+        int[] selectorIndices = getSelectorIndices();
         for (int i = 0; i < selectorIndices.length; i++) {
             if (i == mWheelMiddleItemIndex) {
                 mSelectorWheelPaint.setTextSize(mSelectedTextSize);
@@ -1379,7 +1430,7 @@ protected void onDraw(Canvas canvas) {
                 mSelectorWheelPaint.setColor(mTextColor);
             }
 
-            int selectorIndex = selectorIndices[i];
+            int selectorIndex = selectorIndices[isAscendingOrder() ? i : selectorIndices.length - i - 1];
             String scrollSelectorValue = mSelectorIndexToStringCache.get(selectorIndex);
             // Do not draw the middle item if input is visible since the input
             // is shown only if the wheel is static and it covers the middle
@@ -1528,7 +1579,7 @@ public static int resolveSizeAndState(int size, int measureSpec, int childMeasur
      */
     private void initializeSelectorWheelIndices() {
         mSelectorIndexToStringCache.clear();
-        int[] selectorIndices = mSelectorIndices;
+        int[] selectorIndices = getSelectorIndices();
         int current = getValue();
         for (int i = 0; i < mSelectorIndices.length; i++) {
             int selectorIndex = current + (i - mWheelMiddleItemIndex);
@@ -1599,7 +1650,7 @@ private void changeValueByOne(boolean increment) {
 
     private void initializeSelectorWheel() {
         initializeSelectorWheelIndices();
-        int[] selectorIndices = mSelectorIndices;
+        int[] selectorIndices = getSelectorIndices();
         int totalTextSize = selectorIndices.length * (int) mTextSize;
         float textGapCount = selectorIndices.length;
         int editTextTextPosition;
@@ -1693,6 +1744,10 @@ private int getWrappedSelectorIndex(int selectorIndex) {
         return selectorIndex;
     }
 
+    private int[] getSelectorIndices() {
+        return mSelectorIndices;
+    }
+
     /**
      * Increments the <code>selectorIndices</code> whose string representations
      * will be displayed in the selector.
@@ -2038,6 +2093,15 @@ public void setDividerThickness(int thickness) {
         mSelectionDividerThickness = (int) dpToPx(thickness);
     }
 
+    /**
+     * Should sort numbers in ascending or descending order.
+     * @param order Pass {@link #ASCENDING} or {@link #ASCENDING}.
+     * Default value is {@link #DESCENDING}.
+     */
+    public void setOrder(@Order int order) {
+        mOrder = order;
+    }
+
     public void setOrientation(@Orientation int orientation) {
         mOrientation = orientation;
         setWidthAndHeight();
@@ -2070,6 +2134,15 @@ public void setSelectedTextColorResource(@ColorRes int colorId) {
         setSelectedTextColor(ContextCompat.getColor(mContext, colorId));
     }
 
+    public void setSelectedTextSize(float textSize) {
+        mSelectedTextSize = textSize;
+        mSelectedText.setTextSize(pxToSp(mSelectedTextSize));
+    }
+
+    public void setSelectedTextSize(@DimenRes int dimenId) {
+        setSelectedTextSize(getResources().getDimension(dimenId));
+    }
+
     public void setTextColor(@ColorInt int color) {
         mTextColor = color;
         mSelectorWheelPaint.setColor(mTextColor);
@@ -2087,14 +2160,7 @@ public void setTextSize(float textSize) {
     public void setTextSize(@DimenRes int dimenId) {
         setTextSize(getResources().getDimension(dimenId));
     }
-    public void setSelectedTextSize(float textSize) {
-        mSelectedTextSize = textSize;
-        mSelectedText.setTextSize(pxToSp(mSelectedTextSize));
-    }
 
-    public void setSelectedTextSize(@DimenRes int dimenId) {
-        setSelectedTextSize(getResources().getDimension(dimenId));
-    }
     public void setTypeface(Typeface typeface) {
         mTypeface = typeface;
         if (mTypeface != null) {
@@ -2155,7 +2221,11 @@ private float pxToSp(float px) {
     }
 
     public boolean isHorizontalMode() {
-        return mOrientation == HORIZONTAL;
+        return getOrientation() == HORIZONTAL;
+    }
+
+    public boolean isAscendingOrder() {
+        return getOrder() == ASCENDING;
     }
 
     public int getDividerColor() {
@@ -2170,6 +2240,10 @@ public float getDividerThickness() {
         return pxToDp(mSelectionDividerThickness);
     }
 
+    public int getOrder() {
+        return mOrder;
+    }
+
     public int getOrientation() {
         return mOrientation;
     }
@@ -2186,6 +2260,10 @@ public int getSelectedTextColor() {
         return mSelectedTextColor;
     }
 
+    public float getSelectedTextSize() {
+        return mSelectedTextSize;
+    }
+
     public int getTextColor() {
         return mTextColor;
     }
@@ -2198,7 +2276,4 @@ public Typeface getTypeface() {
         return mTypeface;
     }
 
-    public float getmSelectedTextSize() {
-        return mSelectedTextSize;
-    }
 }
diff --git a/library/src/main/res/values/attrs.xml b/library/src/main/res/values/attrs.xml
index e7ab119..235d1ce 100644
--- a/library/src/main/res/values/attrs.xml
+++ b/library/src/main/res/values/attrs.xml
@@ -12,14 +12,18 @@
         <attr name="np_formatter" format="string" />
         <attr name="np_max" format="integer" />
         <attr name="np_min" format="integer" />
+        <attr name="np_order" format="enum">
+            <enum name="ascending" value="0" />
+            <enum name="descending" value="1" />
+        </attr>
         <attr name="np_orientation" format="enum">
             <enum name="horizontal" value="0" />
             <enum name="vertical" value="1" />
         </attr>
         <attr name="np_selectedTextColor" format="color" />
+        <attr name="np_selectedTextSize" format="dimension" />
         <attr name="np_textColor" format="color" />
         <attr name="np_textSize" format="dimension" />
-        <attr name="np_selectedTextSize" format="dimension" />
         <attr name="np_typeface" format="string" />
         <attr name="np_value" format="integer" />
         <attr name="np_wheelItemCount" format="integer" />
diff --git a/sample/src/main/java/com/shawnlin/numberpicker/sample/MainActivity.java b/sample/src/main/java/com/shawnlin/numberpicker/sample/MainActivity.java
index 1beac55..e1f3042 100644
--- a/sample/src/main/java/com/shawnlin/numberpicker/sample/MainActivity.java
+++ b/sample/src/main/java/com/shawnlin/numberpicker/sample/MainActivity.java
@@ -31,6 +31,10 @@ protected void onCreate(Bundle savedInstanceState) {
         numberPicker.setSelectedTextColor(ContextCompat.getColor(this, R.color.colorPrimary));
         numberPicker.setSelectedTextColorResource(R.color.colorPrimary);
 
+        // set selected text size
+        numberPicker.setSelectedTextSize(getResources().getDimension(R.dimen.selected_text_size));
+        numberPicker.setSelectedTextSize(R.dimen.selected_text_size);
+
         // set text color
         numberPicker.setTextColor(ContextCompat.getColor(this, R.color.dark_grey));
         numberPicker.setTextColorResource(R.color.dark_grey);
@@ -39,10 +43,6 @@ protected void onCreate(Bundle savedInstanceState) {
         numberPicker.setTextSize(getResources().getDimension(R.dimen.text_size));
         numberPicker.setTextSize(R.dimen.text_size);
 
-        // set selected text size
-        numberPicker.setSelectedTextSize(getResources().getDimension(R.dimen.selected_text_size));
-        numberPicker.setSelectedTextSize(R.dimen.selected_text_size);
-
         // set typeface
         numberPicker.setTypeface(Typeface.create(getString(R.string.roboto_light), Typeface.NORMAL));
         numberPicker.setTypeface(getString(R.string.roboto_light), Typeface.NORMAL);
diff --git a/sample/src/main/res/layout/content_main.xml b/sample/src/main/res/layout/content_main.xml
index 3cdf0b6..9870ae9 100644
--- a/sample/src/main/res/layout/content_main.xml
+++ b/sample/src/main/res/layout/content_main.xml
@@ -31,11 +31,13 @@
         app:np_dividerColor="@color/colorAccent"
         app:np_max="10"
         app:np_min="0"
+        app:np_order="descending"
         app:np_orientation="horizontal"
         app:np_selectedTextColor="@color/colorAccent"
         app:np_textColor="@color/colorAccent"
         app:np_textSize="@dimen/text_size"
         app:np_selectedTextSize="@dimen/selected_text_size"
-        app:np_typeface="@string/roboto_light" />
+        app:np_typeface="@string/roboto_light"
+        app:np_wrapSelectorWheel="true" />
 
 </RelativeLayout>