LectroFan Micro2 is a portable Bluetooth speaker with 11 built-in sounds to help you get better sleep. Pair it with your smartphone for streaming audio and making calls with the built-in microphone, or select sleep sound mode and enjoy your choice of five digital fan sounds, four variations of white, pink, and brown noise, and two ocean surf sounds. It’s powered by a built-in battery that lasts for up to 40 hours playing sleep sounds, or 20 hours playing Bluetooth audio between charges.