Feature:1. Cancel out any noise pollution to give you a quiet space and relax your body and mind.2. Creates a comfortable sleeping atmosphere, achieving deep sleep.3. Help babies and young children fall asleep faster and stay asleep longer, which is helpful for their development.Specification:Features:Cancel out any noise pollution to give you a quiet space and relax your body and mind.Creates a comfortable sleeping atmosphere, achieving deep sleep.Help babies and young children fall asleep faster and stay asleep longer, which is helpful for their development.Also helps you focus your attention in study and work.Built-in 10 sleep song which are carefully selected.Lanyard design, can be hung up to save space.Built-in 300mAh battery-capacity, supports using for 23 hours.Compact size, can be easily packed up and brought along for your travel.Specifications:Model: Q3Material: ABS + silicone + electronic components Color: whiteInput voltage: D C5VCharging current: 1APower: 1WBattery-capacity: 300mAhUsing time: 23hCharging time: 1h Music: 8 songsItem size: 93 * 80 * 28mm / 3.66 * 3.15 * 1.1inItem weight: 66g / 2.33ouncesPackage size: 158 * 106 * 31mm / 6.22 * 4.17 * 1.22inPackage weight: 125g / 4.41ounces Note:1.Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures.2.Please allow a little measuring deviation due to manual measurement.Package List:1 * Noise Sound Machine 1 * Hanging String1 * USB Cable1 * User ManualPackage List:1 * Noise Sound Machine 1 * Hanging String1 * USB Cable1 * User Manual