White noise sound provides white noise, fan noise, and natural music sounds (3 types of sound), creating a peaceful environment. The volume is adjustable and easy to use. Warm Lighting and Bulb: Warm light can be used as a night light to help babies sleep, with 5 levels of adjustable brightness. Colorful mood lights create a romantic atmosphere for you. Playback Memory & Sound On Again: When you turn the sound back on, it will play the sound that was previously turned off. 30/60/90 minutes, three timed speeds to control the playback of sleep sounds. Rechargeable & Portable: Built-in 1200mAh large-capacity battery, with its own easy-to-charge USB cable. It is lightweight and portable for home and outdoor use. Suitable for relieving stress, encouraging babies to sleep, and can be widely used in children's rooms, bedrooms, study rooms, offices, tea rooms, yoga rooms, etc. Makes a great gift for family, friends, colleagues, etc.