Freely adjustable temperature: 37C-55C to be set. After reaching the set temperature, a constant temperature will be maintained. Use the 9V2A/18W or 12V2A/24W adapter for rapid heating and start reaching high temperatures in 10-15 minutes. Versatile: designed for travel and breastfeeding. If you don't need to feed your baby urgently, you can choose a 5v2A/10W adapter, suitable for keeping warm or slow heating (about 30 minutes). Respond to your differences dietary needs. SAFE AND RELIABLE MATERIAL: The milk thermal bag is made of high quality microfiber PU material, non-toxic and tasteless, suitable for babies. It measures about 310 x 115 mm / 12.2 x 4.52 inch, it will fit most baby bottles, don't you don't worry if the size doesn't match. USB cable charging: The milk warmer can be used as a power bank, charging socket and car USB interface (excluding power bank). Lightweight and portable, easy to carry outdoors. Please do not heat the bottles empty. Non-slip and portable: Using non-slip silicone, it is not easy to fall off and can be applied to a variety of materials, such as water cups, mineral water bottles, milk boxes, etc The shackle is portable and can be attached to a stroller or crib.pink