Features: White noise not only has a beneficial effect on sleep quality, but also improves concentration and work efficiency. White noise is very similar to the sound of mom's womb , which can greatly calm the baby. also suitable for students, youth and elder people. Built-in 6 soothing sounds to choose from: rain, forest, waves, flowing stream, lullaby and white noise. Any kind can greatly help sleep. With breathing light, soft warm light can create an environment more suitable for sleeping and help you get into the sleep state quickly. The built-in 1200 -mAh large capacity battery with long working time up to 30 hours, easily charged by power bank, adapter, computer, etc. With intelligent timing function, convenient to use; Compact size and light weight, good for home use, office use and travel use. Specifications: Material: ABS/PC Rated power: 1.5W Color temperature: 2700K-3100K Working temperature: -10 -55 Battery capacity: 1200mAh Charging time: 1.5 hours Working time: 15-30 hours Product size: 9 * 9 * 3.1cm / 3.5 * 3.5 * 1.2in Package size: 9.2 * 9, 2*6.5cm/3.6*3.6*2.5in Package List: 1*Sleeping Machine Note: 1. Please allow a little error due to manual measurement. Please make sure you do not mind before you bid. 2. The color may have different as the difference display, please understand. Note: Hello, please pay attention to your receiving address when purchasing products. If your receiving information (such as: name, street, house number, no name on the doorbell/mailbox or other information is incorrect. The order will not be delivered correctly.)