20 Soothing Sounds: Our baby speaker features 20 built-in sound effects: 9 nature sounds, 5 gentle music sounds, 5 white noise sounds, and 1 fetal sound. It effectively blocks unwanted background noise, making it ideal for infants and adults of all ages who need rest and relaxation. 1000mAh High-Capacity Battery: The built-in 1000mAh battery provides 9-14 hours of use after a 3-hour charge. An indicator light flashes to remind you to charge when the battery is low. Three Timer Modes: This portable white noise machine can play continuously throughout the day. You can also set an auto-off timer for 30/60/90 minutes; the machine will automatically turn off and stop playing after the set time, helping you relieve stress. Portable Design: The white noise machine has a snap design on the top for easy portability. It can be placed in a crib, car seat, or stroller, or easily tucked into a bag or pocket. Versatile Use: The machine can be used immediately after being turned on, even without Wi-Fi coverage. It's perfect for sleep, rest, meditation, yoga, and is also an ideal sound therapy device for home, office, vacation, or business trips.