Help your guests fall asleep and stay asleep with the naturally soothing white noise of a Yogasleep Dohm sound machine. As the original sound machine introduced in 1962, Yogasleep uses fan-based white noise to create a comforting sleep environment that masks noises which might otherwise disturb sleep. The UNO machine features Yogasleep's signature fan-based natural white noise in its simplest form: a one-speed machine. Just turn it on, rotate to find the best sound for you, then let the noise-masking magic happen. Give sleep a chance! UL/CUL Listed