1. White Noise for Better Sleep: With white noise, this baby sleep machine helps to relieve fatigue and improve sleep quality, making it easier to fall asleep quickly and enjoyably.2. 18 Soothing Sounds: The features 18 different soothing sounds that can help you relax and enter a deep sleep state. Additionally, the breathing light sleep aid feature adjusts its brightness in sync with your breathing rhythm to enhance relaxation and help you fall asleep.3. Long Battery Life: With a 300mAh battery, this white noise sound machine can be used for up to 18 hours on a single charge, ensuring it stays with you throughout the night.4. Blocks Out External Noise: In addition to helping you sleep, white noise can also block out external noises and distractions, enabling you to focus better on work or study.5. Simple Touch Control: The touch-sensitive buttons easy to control the machine's settings.Model:M5Polymer battery:300mAhInput voltage:DC5V=0-1ARated power:1WCharging time:1.5 hoursWhite noise usage time:18 hoursNet weight:85gColour:WhiteMaterial:PlasticSize:about 40x74mm/1.57x2.91 inchPackage Contents:1 * White Noise Sound Machine1 * USB CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.