White Noise Therapy Sound Sleep Soothing Relax Machine 9 Nature Sounds Sleep Aid For Baby Adult features 1. 9 kinds of smooth and natural sounds: It features white noise, wave sound, summer night sound, rain sound, birdsong, rivulet sound, light music, serenade and lullabies, so you can choose sounds according to your preferences and needs to create a peaceful environment 2. Portable Design: It takes up a small space on the bedside table and can be easily put in your bag or suitcase, making it the perfect travel companion. 3. Not only for sleep: Our white noise sound machine not only masks sound, improves sleep quality, but also suitable for use at home, office, dormitory, children's room or anywhere you want. 4. Auto Off Timer: This white noise machine can play continuously non stop all night long or there is an auto off timer to set for 15, 30 or 60 minutes to save energy (Light display). 5. It features a light display, and according to the light, you can adjust the breathing in 10 minutes to relax your body. 6. It features a built-in lithium battery and USB charging, can be used continuously for 50 hours for a full charge. Specification Type White Noise Machine Material ABS + PC + Silicone + Electronic Components Charge MethodUSB Cable Power1W Battery Capacity800mAh Charging time1.5 hours Operating time50h Size8 x 8 x 3.3cm / 3.1 x 3.1 x 1.3in packaging included 1 * White Noise Machine 1 * USB cable 1 * Manual Note: 1.Please allow 1-3cm differences due to manual measurement, thanks. 2.Please understand because of the light radiation or computer display difference, so I can't guarantee pictures and real color is 100% the same.