Units:1.00 count 1. The white noise machine can play sound all night, or you can set 15, 30, 60 minutes auto-off optional timer to avoid wasting energy when you fall asleep2. The portable white noise machine provides 9 sound options, including: ocean waves, thunder, light music, white noise, wind, stream, summer night, rain, birdsong, with excellent speakers and different precise volumes3. You can choose to connect to your device with a USB data cable or use 4 AA batteries (batteries not included) to carry with you for chargingSpecification:Dimensions: 12.5 x12.5 x 6.5cm (L x W x H)Weight: 180 gramsPackage Included:White Noise Generator x 1Micro USB cable x 1user manual x 1 9 Preset Natural SoundsThe portable white noise machine provides 9 sound options, including: ocean waves, thunder, light music, white noise, wind, stream, summer night, rain, birdsong, with excellent speakers and different precise volume, it helps you naturally block out distractions 30, 60, 90 Minutes TimerThe white noise machine can play continuously, or you can set a 30, 60 or 90 minutes timer, which means the machine will automatically turn off and stop playing the sound after the desired time to avoid You waste energy while falling asleep 2 Charging OptionsYou can choose to connect to your device with a USB cable or take it with you with 4 AA batteries (batteries not included) for charging, easily fits into your handbag or suitcase, perfect for home, office , car and travel Adjustable volumeThe white noise machine has an adjustable volume control, you can adjust the sound to the volume that suits you according to your sleep needs, the wonderful sleep sound machine is a gift for babies, children, new mothers, and work people with insomnia High-quality after-salesProduct size: 12.5*12.5*5.5cm, we are committed to providing the best quality products and services, if you have any questions, please contact us in time, we will reply to you within 24 hours to help you solve question 9 Preset Natural SoundsThe portable white noise machine provides 9 sound options, including: ocean waves, thunder, light music, white noise, wind, stream, summer night, rain, birdsong, with excellent speakers and different precise volume, it helps you naturally block out distractions 30, 60, 90 Minutes TimerThe white noise machine can play continuously, or you can set a 30, 60 or 90 minutes timer, which means the machine will automatically turn off and stop playing the sound after the desired time to avoid You waste energy while falling asleep 2 Charging OptionsYou can choose to connect to your device with a USB cable or take it with you with 4 AA batteries (batteries not included) for charging, easily fits into your handbag or suitcase, perfect for home, office , car and travel Adjustable volumeThe white noise machine has an adjustable volume control, you can adjust the sound to the volume that suits you according to your sleep needs, the wonderful sleep sound machine is a gift for babies, children, new mothers, and work people with insomnia High-quality after-salesProduct size: 12.5*12.5*5.5cm, we are committed to providing the best quality products and services, if you have any questions, please contact us in time, we will reply to you within 24 hours to help you solve question