Features:*You can choose 10 soft sounds: ten sleep soothing music: white noise, dividend noise, emotional soothing music, soothing music, sea waves, bird song, thunder and rain, bonfire, running water, summer night insects*Sometimes, the mother's voice may help the baby improve sleep, rather than the sound installed in the machine.1.Maximum recording time: 5 minutes at a time.2.Automatic timer: Set the playing time to 30, 60 or 90 minutes.3.Night light: You can turn on the night light by clicking the lampshade or through the "on/off" button. White light and warm light are optional.4.Volume control: adjust the volume through the button "+/-".5.Power supply: AA battery or USB. Any 5V mobile adapter (without battery) Both can be used as a power source.6.Headphone jack: For convenience, there is a headphone jack near the USB jack. You can use headphones to enjoy the relaxing sound, so as not to disturb your family or others.Thank you for working with us. We sell products in good faith,If you have any questions, please contact us in time,We will solve it for you within 24 hours.