Features: Comes with 9 kinds of smooth and natural sounds, you can choose the one you want to create an of quiet for you to fall asleep quickly and rest completely. USB Rechargeable, its battery life lasts about 36 hours when it's full of power, you can use it overnight without worrying about battery dying. Portable size, mini and lightweight, perfect for outdoor use, easy for you to put it into your bag or suitcase. It features a light display function, you can adjust the breathing in 10 minutes to make your body relaxed. The auto-off timer can be set as desired, you can choose 15, 30, 60 minutes to turn off the machine. Specifications: Type: Sleep Sound Machines Material: ABS + PC + Silicone Working Voltage: 4.2V Battery Capacity: 1200mAh Power: 1W Color: White Charging Time: 1.5h Working Time: 36h Item Size: Approx. 80 * 80 * 33mm / 3.15 * 3.15 * 1.3in Package Size: Approx. 100 * 100 * 40mm / 3.94 * 3.94 * 1.57in Package Weight: Approx. 160g / 5.64oz Package List: 1 * Sleep Help Device 1 * USB Cable 1 * User Manual

Comes with 9 kinds of smooth and natural sounds, you can choose the one you want to create an of quiet for you to fall asleep quickly and rest completely.USB Rechargeable, its battery life lasts about 36 hours when it's full of power, you can use it overnight without worrying about battery dying.Portable size, mini and lightweight, perfect for outdoor use, easy for you to put it into your bag or suitcase.It features a light display function, you can adjust the br