[A good night's sleep allows you to be productive during the day] S7-ECO has a dual function: they can send soothing sounds to babies in the nursery and they can send soothing sounds to adults in the office. The S7-ECO premium speaker system provides an immersive simulation of natural sounds, allowing you to relax deeper into your work or your play. Note: The product does not have a battery!. [Multifunctional Speaker] The S7-ECO features an integrated sound generator and multifunctional speaker in one sleek, minimalist package. Stream your favorite sounds and music directly from your smartphone/tablet to the S7-ECO speakers, so you don't need to add additional devices during use. [Memory function, user-friendly] The sleep noise machine has continuous play and automatic shut-off options for intervals of 0.5, 1, 2, 8, and 10 hours, as well as a memory for frequent settings for sound level and timer, so you can easily set up the device by pressing a few buttons rather than repeating all the steps every time. [Effectively blocks out noise in multiple scenes] This sound machine offers a sleek, modern design and an elegant white finish. The S7-ECO has a wide range of volume adjustments between 45dB (A) and 110dB (A), to suit your individual environment. It has a multi-range volume level, allowing you to adjust the volume as necessary to protect your speech privacy in the office. [13 Loop-Free Hi-Fi Sounds] This White Noise Machine has three white noise sounds, three fan sounds, four nature sounds (including surf, rain, thunderstorm, and summer night ), and baby Shushing and lullabies. Choose the perfect channel and get ready for your personalized sleep therapy!.