White noise- the sound of natural and harmonious sleep. Specifications: Voltage: DC5V 0.8A; Power: 1.5W; Battery: 1200mAh; Color temperature: 2700-3100k; Working temperature: -10-55; Charging time: 1.5H; Working time: 15-30H; Material:Plastic; Color:White; Size:90x90x31mm; Power supply mode: rechargeable, USB, battery; Function: timing, music function; 6 NATURAL SOUNDS; Rain; Forest; Waves; Stream water; Lullaby; White noise; Application for Baby crying and sleepless; Early awakening headache; Trouble sleeping; Less sleep in old age; Many dreamss are easy to wake up; Feature -Sound Machine can leave the sound on all night or use the optional timer that can be set for 15,30,60 minutes. -Built-in Battery, can be used without USB cable. -White noise cancelling machine offers 6 distinct sounds to choose which masks background noises so you sleep better. -Music and light to help sleep.Shielding and attenuating "colored noise" that hinders sleep.Create a deep sleep sound environment to help sleep. -Beautiful and modern design made it looks elegant. It is a good choice of decorate your home, your room and your office.It will be a perfect gift for the Birthday of your families and friends, or New Year, Valentine's Day, Christmas, Thanksgiving Day. Package included: 1 x White Noise Machine