The Tranquil Moments Bedside Speaker & Sleep Sounds device comes with preloaded sounds to help its owner sleep and relax. You can twist the dial to choose from 12 digital sound programs where it will gradually slow down playback over a time span of 30 minutes in order to lull you to sleep. You can have it play continuous, or select from 30, 60 or 90 minute sleep timer options. Furthermore, the Tranquil Moments Bedside Speaker & Sleep Sounds will function as a wireless Bluetooth speaker, where it can be paired any smartphone, tablet or other device, and you can connect your mobile device with a headphone jack 3.5mm.