1) Download MP4 to iPhone Ringtone Converter and install it.
2) Click "Browse" Button to import the source MP4 video files, iTunes music or purchased music are also supported.
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3) Cut a clip as iPhone Ringtone: Drag slider bars to set the starting piont and ending piont of the clip. Or you can set the start time and end time manually in the boxes.

4) Preview Feature: With the built-in music player, you can preview the marked segment or the loaded muisc in WMV to M4R Converter by clicking "Pre-listen" and "Listen" button
5) How to transfer M4R music to iPhone?
In this easy WMV to M4R Converter, you can convert WMV to M4R to your hard drive; then snyc it to iPhone by iTunes. Or check the box “Export to iPhone” to transfer M4R to iPhone ringtone directly. You do not need iTunes or any other programs.
Notice: Maker sure connect iPhone with PC before you check the box.
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