The white noise machine is made of 11 different noise effects, which can be played individually or together based on your personal preference. Allowing you to freely customize your favorite sound combinations. The sound machine includes sounds such as rain, bird chirping, ocean waves, stream, campfire, train, crickets, and church bells...... Cozy Night Light Modes: while the underneath warm night light helps to strengthen it. Plus the turned on background noise, all these are offering you a good sleeping and working companion. Built-in Speaker: Apart from the 11 white noise effects that come , you can also connect the machine with your own device and play your favourite music or podcast, enjoying the most out of your ! Moreover, it is an excellent gift choice to make or friends. Efficient Plug in Design: You don't have to worry about running out of power any more! The white noise machine for sleeping is plug-and-play through a USB cord (included in the package). The intuitive button control enables an easy and effortless operation. [30-90 Minute Timer Settings]: The portable brown noise machine features an auto-off timer that can be set from 30/60/90 minutes . The sound gradually fades out until it turns off, making it the most considerate brown noise machine you'll ever own. Rated voltage: 5 V Rated current: 1 A Bluetooth version: 5.2 Bluetooth IC: AC6926A Battery capacity: 1500 milliamperes Charging time: Approximately 2 hours The duration of music and lighting is approximately 15 to 25 hours The maximum duration for playing pure music: 72 hours; colour: Green material: ABS Package Contents: 1 x White Noise Sound Machine 1 x USB cable 1 x English Instruction Manual 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.