Features:White Noise Machine for Sleep AidDreaming, continuous shallow sleep and waking up in midnight are typical sleep problems of many persons. The white noise machine is designed to improve your sleep environment, relieve your mood, and help you sleep easily and peacefully20 Soothing SoundsBuilt-in 20 soothing sounds, such as lullaby, wood burning, wave, stream, fan, bird sound, rain, frog voice, etc, which can keep little ones feel safe and relaxed, then drift off to sleep slowly.Precise Volume & Timer SettingSupports 7 levels of volume adjusting, 30min/60min/90min timer functions, you can built a comfortable environment freely, suitable for babies and adults. And the headphone jack offers a more personal space for you in public.Built-in Rechargeable BatteryBuilt-in 1800mAh battery that can be recharged by the included USB cable, long working time and quick recharge, no need to worry about power off problems.Compact & Portable for TravelCompact and ultrathin design, can be placed on bedside table, office desk or other smooth surface. You can also take it with you when go out for camping, fishing, traveling, etc.Specifications:Color: WhiteMaterial: ABSBattery Capacity: 3.7V 1800mAhInput Voltage: DC 5VCharging Current: 1AItem Size: 15.2 * 14.9 * 3.7cm/ 6 * 5.9 * 1.5inItem Weight: 450g/ 15.9ozPacking List:1 * White Noise Machine1 * USB Cable1 * Users Manual(English)