It's Your Choice! Whether you want your teeth whiter right now or over a few nights while you sleep, Zoom! is your answer. The Zoom! In-Office Whitening System uses proprietary technology to whiten your teeth an average of eight shades in a little over an hour while you relax at Dr. Charles's office. It's ideal for anyone who wants immediate results. The Zoom! Take-Home Whitening System uses a revolutionary patent-pending gel to whiten your teeth an average of six shades in three nights. And you may go even lighter with additional applications. Start on Friday and by Monday you'll have a whole new smile.