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 white noise machine 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:M5 Polymer battery:300mAh Input voltage:DC5V=0-1A Rated power:1W Charging time:1.5 hours White noise usage time:18 hours Net weight:85g Colour:White Material:Plastic Size:about 40x74mm/1.57x2.91 inch Package Contents: 1 * White Noise Sound Machine 1 * USB Cable Only 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.