White Noise Machine Sound Sleep Soothing Relax Machine 9 Nature Sounds Sleep Aid for Baby Adults 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 that you can choose sounds according to your preferences and needs to create a quiet environment 2. Portable design: It takes up a small space on the bedside table and can be easily put into your bag or suitcase, making it the perfect travel companion. 3. Not just for sleep: our white noise sound machine not only masks noise, improves sleep quality, but also is suitable for use at home, in the office, in a dorm, in a baby nursery or anywhere you want. 4. Automatic shutdown timer: This white noise machine can be played continuously non-stop all night or there is an auto-off timer to set for 15, 30 or 60 minutes to conserve energy (Light display). 5. It features a light display and according to the light, you can adjust the breathing in 10 minutes to make your body relaxed. 6. It features built-in lithium battery and USB charging, can be used continuously for 50h for a full charge. Specification TypeWhite Noise Machine MaterialABS+PC+Silicone+Electronic Components Charge MethodUSB Cable Power1W Battery Capacity800mAh Charging Time1.5h Use Time50h Size8 x 8 x 3.3 cm / 3.1 x 3.1 x 1.3 inch Package Include 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 irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.