Product Description:The White Noise Machine contains 9 types of soft and natural sounds: it has waterfall sound, bird call, cricket call, lullaby, running water sound, water wave sound, musical instrument sound, white noise, wind sound, so you can choose sounds according to your preferences and need to create a quiet environment for you to fall asleep and rest completely.This device is only 8x8x3.3cm. It takes up a small space on the nightstand and can be easily placed in your purse or suitcase, making it the perfect travel companion.This white noise sound machine not only masks noise. It helps improve your sleep quality and is also suitable for use at home, office, dorm, baby nursery, or any place you want.This white noise machine can play continuously without stopping all night or there is an auto-off timer to set for 15, 30, or 60 minutes to save energy. It has a light display and according to the light, you can adjust your breathing in 10 minutes to let your body relax.This device is equipped with a built-in lithium battery and supports USB charging. It can be used continuously for 20-35 hours after fully charging the device that takes up to 1.5 hours.Product Specification:Color: WhiteMaterial: ABS, PC, Electronic ComponentsSize: 80 x 80 x 33mmWeight: 125gFunctions: White noise MachineUsage Time: 20 - 35 hoursCharging Time: 1.5 hoursBattery Information: 800mAhWorking voltage: 4.2vPower: 1wPackage Inclusion:1x White Noise Device1x Charging Cable1x User Manual