The Yogasleep GO provides great sleep anywhere with features designed for travelers. • Masks disturbing, distracting noises for improved sleep and concentration. • Includes 11 high-quality sound options: fans, white noise & nature-scapes • Convenient USB recharging eliminates need for batteries or access to outlet. • Fully adjustable volume and speaker angle suits any situation. • Stand converts into convenient hook for hanging on doorknobs or bedposts