1. Customized Sound: The white noise machine consists of 8 different noise effects, which you can play individually or in combination according to your personal preferences. It allows you to customize the sound combination you like. The 8 sound effects include: sleep music, thunder, bowl therapy, ocean waves and seagulls, holiday bonfire, stream water, frogs and birdsong. You can also add your favorite essential oils to improve the atmosphere around you. Please note: the maximum volume line. In addition, background noise can also help you sleep well and work more efficiently. In addition, it is also a perfect gift for your family or friends. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store