Description Adjustable volume: Adjustable volume control lets you get the perfect sound. 12 soothing sounds: Includes 10 sounds of light music, birds and waves. All sounds are soothing and calming, no harsh noises. Select the sound you prefer. Auto-off timer: The auto-off timer can be set to 15, 30, 60 minutes to save power, no more worry about forgetting to turn off the machine. Portable Size: Small size and lightweight with silicone strap, perfect for outdoor use, and can be easily attached to stroller or cot. White Noise Sound Machine: Help create peaceful environment, increase your concentration while studying or working, make baby fall asleep faster and fully rested. With 12 soothing sounds and an automatic shut-off timer. Includes 12 smoothing sounds: 10 soft sounds, bird and wave sounds; Adjustable volume 3 timers: 15min, 30min, 60min Powered by 3pcs AAA battery (NOT included) Hang on the stroller easily or just stand on the table top Smooth, Burr-Free Surface Design Small size and portable and lightweight design Color: White + Gray Material: Plastic + electronic components Product size: 10 * 6 * 11cm Power supply: 3 AAA batteries (NOT INCLUDED) Timer: 15min, 30min, 60min Recommended age: 0+ Cleaning: Wipe gently with a damp clothProducts from NIUNIUs store