WARRANTY SERVICE - This white noise machine comes with lifetime after-sales warranty service! If you have any issues or are unsatisfied with your purchase, please contact us. We'll try our best to provide a solution for you. PORTABLE AND RECHARGEABLE - Equipped with Type-C charging port and included charging cable, it supports wireless use and is suitable for a variety of on-the-go occasions. ELEGANT DESIGN - Stylish and simple, easy to operate. Suitable for all ages, including babies, kids, adults, seniors, allowing you to have a good sleep or focus enviroment. TIMER CONTROL - Short press the switch button to select the timer. When the indicator is GREEN, it means continuous working; WHITE means 30min timer; BLUE means 60min timer. 15 NON-LOOPING SOUNDS - Including white noise, pink noise, brown noise, fan sound, rain, waves, insects, campfire, birds, streams, etc. Small in size, but rich in options!. POCKET WHITE NOISE MACHINE - Measuring just 1.89x1.89x1.57 inches, the tiniest white noise machine on the market! Fits easily in your pocket and can be carried anywhere.