Product Information:- Made of high quality safe PU material, 4 layers design, with adjustable Velcro suitable for most bottle sizes(diameter 55-80mm).- One button control, press for 3 seconds to turn on and turn off. 3 temperature adjustment, just press once to switch from different temperature levels.- After connecting the power, the milk warmer bag can constantly keep the milk temperature and prevent it from being cold, baby can drink warm milk anytime.- Compatible with various USB devices, lightweight with compact size and portable handle, perfect for travel and outdoor use.Technology:We specialize in producing more than 30 years, the product quality is guaranteed.We believe that good materials, stylish design and first-class technology will bring you a better product experience.About SONARIN:SONARIN company focused on research and development of maternal and child products, committed to providing baby protection and care.If you have any questions, please leave a message, we will reply to you within 24 hours and provide the best service.If you are not satisfied, please contact us, we will solve the problem until you are satisfied.Thank you for coming our store, please enjoy shopping!