Portable Baby Sleep Music Player Machine With Hanging Strap Gifts Features 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. 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. Hang on the stroller easily or just stand on the table top. Smooth, Burr-Free Surface Design: Small size and portable and lightweight design Four types of baby-soothing music: two lullabies, two natural sounds, three automatic timer programs (15, 30 and 60 minutes) Requires AAA batteriesbatteries not included Specifications Package Include: 1PC*Baby Sleep Music Player Note: Due to different personal measurement methods, there will be an error of 2-4 cm, please understand Thanks for your support