Smart Timer & Precise Volume: Set the sound machine for sleeping adults to play for 45min, 90min, 8hrs, or nonstop. Adjust volume across 32 levels for personalized comfort. Note: AC-powered only (no batteries) Auto-Memory White Noise Machine: The sleep sound machine for adults remembers your last used light, sound, and volume settingsno nightly reset needed. Just press play and drift off effortlessly High Quality Customer Service: We provide a complete after-care system. If you have any questions or inconveniences when using the product, please contact us. we have professional engineers to solve the problems for you. is dedicated to getting your day started right 8 Relaxing Light Modes: Ideal for a white noise machine for sleeping, choose from 2 warm tones, 5 calming colors, or a gentle gradient, you can use it as a feeding light and night light 40 Soothing Sounds for Adults: Perfect as a sound machine for sleeping, this white noise machine offers 10 nature tracks, 10 baby lullabies, 10 ambient noises, and 10 fan sounds. Block disruptions and create a peaceful sleep environment tailored for adults and babies and kids