4 Adjustable Brightness Levels & Breath TherapyGet the perfect sound machine for sleeping with 4 brightness settings and breath therapy mode; Follow the light's breathing pattern to find inner peace between inhale and exhale. This sound machine with night light is ideal for meditation, sleeping, or waking up at night.Portable with Built-in BatteryThe portable sound machine has a compact size and a built-in 1800mAh battery, providing up to 10 hours of playback time. You can take the sound machine on-the-go with ease, or place the portable white noise machine in wherever you need to be.Bluetooth Speaker & Headphone JackEnjoy music in two ways: 1. Use the 3.5mm headphone jack for rich and clear sound without disturbing others. 2. Stream your favorite songs from your phone or laptop, turning your white noise machine into a high-quality speaker.3 Timer SettingsThe adult sound machine has 3 timer settings-60, 120, or 180 minutes. Setting the timer to leave it automatically turn off after falling asleep makes it the best white noise machine for adults.255+ Customized Sleep SoundsThe white noise machine includes fan, cricket, rain, bonfire, wave, stream, bird, bowl. Each has different soothing sound tracks and independent volume control. In addition, the sleep sound machine creates a personalized sleeping, relaxing, or calming experience for both adults and children.