【21 Soothing Sounds】 Built in 21 soothing sounds, including white noise, fan sound, bird sound, ocean wave, rain sound, sound of train, and so on, which helps block annoying environmental noises and let baby fall asleep easier and deeper. 【Soft Night Light】 Equipped with a night light that supports white light and warm light switching. Soft and not dazzling, won't irritate babies or disturb their sleep, a good helper for midnight feeding. 【Precise Volume Adjusting & Timer Setting】 Supports precise volume adjusting, 30min/60min/90min timer setting, create a comfortable environment for baby sleeping. Enjoy a peaceful night and sweet dream. 【Built-in Rechargeable Battery】 Built-in 1800mAh large capacity lithium battery, long working time and can be recharged via USB cable conveniently. Portable and lightweight, convenient for home and travel use. Specifications: Color: White/ Grey(optional) Timer: 30min/60min/90min Soothing Sounds: 21 Battery Capacity: 1800mA Input: DC 5V 0.8A Charging Time: about 2.5H Working Time: about 15-30H Rated Power: 1.5W Working Temperature: -10℃ to 55℃ Item Size: 9 * 9 * 3.65cm/ 3.5 * 3.5 * 1.4in Item Weight: 150g/ 5.3oz Packing List: 1 * Sleep Machine 1 * USB Charging Cable 1 * Users Manual(English)