Sleep technology has advanced beyond the outdated approach of using a mechanical fan with just a few speeds for audio variety.It is the better solution.It's 100%electronic,with no motor or other internal moving parts.You get a much better variety of sounds,reproduced digitally via a large,high fidelity speaker.It is ideal for relaxation,study,speech privacy,or any situation where you'd like more control of your audio environment.It's also your personal white noise and fan sound machine to ensure a better night's sleep and peaceful rest.SAFETY AND WARRANTY:If there are any quality problems with the product,please contact us as soon as possible and We have a professional after-sales team that will solve your problem within 24 hours.Product name:Colorful light and music sleep aidInput voltage:DC5V.Charging current:1AMaterial:ABS+PLA+silicone+electronic componentsUse power:1WProduct size:91X91X135MMBattery capacity:2000mAhProduct net weight:230gUse time:20 hoursStyle/color:whiteIf you have any questions,please contact us in time,we will answer your inquiry within 24 hours.