Recording function: Mother can pre-record, and the baby will hear mother's voice when she wakes up. - Multiple uses: You can use it to help you fall asleep, distract or improve your concentration while studying or working. Use selectable time settings for 15, 30 or 60 minutes. The machine then automatically shuts off after the set time, so you can cycle smoothly without waking up in the middle and shutting down. - Not only for sleep: Our white noise horn not only helps sleep and improves sleep quality, but also suitable for home, office, bedroom, nursery or any other place you want. Adjustable volume: The white sound machine for sleep includes an adjustable volume control so you can get the sound right and set the perfect volume for your unique environment. The sound of the sleep machine is low enough for a quiet, sound sleep calms babies down and is loud enough to drown out annoying ambient noises. Note: 1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding < br> 2. Color may vary by monitor. Please understand Note: Hello, please pay attention to your delivery address when purchasing products. If your pickup information (e.g. name, street, house number, doorbell/email with no name) is incorrect, the order will not be delivered correctly. )