Did you wish for a sound machine where you could select your own sound library? Now Sound Oasis (http://www.soundoasis.com) has done it with the BST-100 - the revolutionary sound machine and bluetooth speaker in one! Sleep better with any one of our 10 built-in sounds or stream new sounds/music via bluetooth from your mobile device or computer. * Perfect for improving sleep, blocking noise, managing tinnitus, dorms, baby's room. * Built-in micro SD card is preloaded with 10 superior quality Sound Oasis sounds. Your selected sound plays seamlessly for 8 hours. * Exceptional big bass sound, but super compact size (2.6" tall/2.5" in diameter/6.6cm tall/6.35cm in diameter) is perfect for use at home or while traveling. * Stream new sounds or music from any bluetooth enabled device (iPhone/ iPod/iPad/MP3) for exceptional versatility. * Insert a new micro SD card with Sound Oasis sounds for unlimited sound library expansion. Clear your mind, quickly relax and get to sleep naturally!