Revolutionary sound machine and bluetooth speaker in one! Perfect for improving sleep, blocking noise, managing tinnitus, dorms and babys room. Built-in micro SD card is preloaded with 20 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 sounds or music from any bluetooth enabled device (iPhone/ iPod/iPad/MP3) for exceptional versatility. Insert a micro SD card with Sound Oasis sounds for unlimited sound library expansion. 30/10 m Bluetooth wireless range. Built-in rechargeable lithium battery allows for 5 - 8 hours of cordless use on one charge. Stream Sounds/Music from Your Music Library: 1. Turn on your BST-100 by pressing and holding down the BST-100 POWER button for 3 seconds; 2. Your BST-100 will enter the Bluetooth streaming mode by default. The Bluetooth LED on your BST-100 will blink to show that it is discoverable; 3. On your Bluetooth enabled device, turn Bluetooth on, locate the Bluetooth device list and select the device named BST-100. Pair your BST-100 with your Bluetooth enabled device; 4. The Bluetooth LED will light up on your BST-100 and you will hear a Bluetooth pairing mode blip" to indicate that you are in the Bluetooth streaming mode; and, 5. Press play on your Bluetooth device to play the streamed music/sound.