Powered by a built-in, rechargeable battery that last up to 40 hours of sleep sounds or 20 hours of Bluetooth streaming between charges. ‎Adaptive Sound Technologies LectroFan Micro2 Sound Machine for CPAP | White LectroFan Micro2 Sound Machine Overview The LectroFan Micro2 Sound Machine by Adaptive Sound Technologies is a portable all-in-one sound masking device that containing 11 built-in sleep sounds - 5 digital fan sounds, 4 different variations of white, brown and pink noise, and 2 ocean/surf sounds.. You can also pair your smart phone with the LectroFan Micro2 to use it as a Bluetooth speaker for audio streaming and phone calls with the built-in microhpone.

‎Adaptive Sound Technologies LectroFan Micro2 Sound Machine for CPAP | White LectroFan Micro2 Sound Machine Overview The LectroFan Micro2 Sound Machine by Adaptive Sound Technologies is a portable all-in-one sound masking device that containing 11 built-in sleep sounds - 5 digital fan sounds, 4 different variations of white, brown and pink noise, and 2 ocean/surf sounds.Powered by a built-in, rechargeable battery that last up to 40 hours of sleep sounds or 20 hours of Bluetooth streaming between charges..

‎Adaptive Sound Technologies LectroFan Micro2 Sound Machine for CPAP | White LectroFan Micro2 Sound Machine Overview The LectroFan Micro2 Sound Machine by Adaptive Sound Technologies is a portable all-in-one sound masking device that containing 11 built-in sleep sounds - 5 digital fan sounds, 4 different variations of white, brown and pink noise, and 2 ocean/surf sounds.