【10 Natural Sounds】This portable white noise machine features 10 built-in natural sounds to effectively mask ambient noise during baby's naps, bedtime, or travel. It's an ideal choice for everyday sleep. 【Timer and Volume Control】You can choose continuous playback or set a timer for 60, 120, or 180 minutes. Volume up and down buttons allow for easy volume adjustment to suit different rooms and users. 【Compact and Portable】Weighing only about 114 grams, this compact white noise machine easily fits into a handbag or travel bag. It's very convenient to carry when your baby needs familiar sleep sounds during hotel stays or car trips. 【USB Charging Design】Equipped with a USB charging cable, charging takes less than 2 hours. The built-in 250mAh lithium battery provides over 5 hours of continuous use, and it can be easily operated with one hand. 【Lightweight and Easy to Use】Made of ABS material, it has 7 buttons to select tracks, adjust volume, set timers, and control the lights. The colorful LED lights and gradient lighting create a soft atmosphere in the nursery and for nighttime use.