It allows you to select an MP3 or WAV file which is used as an alarm clock. For Windows 9X users, a Voice Interactive Feature is included that allows the user to speak the word 'Snooze' or hit/SLAM the keyboard to snooze the alarm. zSlam! also remembers you favorite song and wake up time. So you only need to set it once and save your settings. Windows 9X supports VIS (Voice Interactive Snooze) if the user has a full duplex sound card.