This is for a digital sound file of rooftop Christmas Eve sound effects in both .mp3 for ipods or .wav for cd players. Play it for your kids during the night so they can hear Santa up on the roof. If they don't wake up, play them the recording the next morning to show them you captured the sounds while they slept. There are 10 seconds of silence at the beginning so you may press play and leave the room. Place player up high on a shelf for best effect.