1. 【Fast Heating】 The baby milk warmer uses a smart temperature sensing chip to heat accurately. This portable bottle warmer uses 5V, 2A adapters to keep warm or heat slowly. When using a fast charger (9V, 10V car adapters and an output voltage greater than 12V), the green light will flash, and the baby milk bottle thermostat can heat up quickly. If the green light is always on, it means that the baby milk bottle warmer has been heated to 45°C and started keeping warm! 2. 【USB Bottle Warmer】 The baby milk warmer comes with a USB cable, just connect the cable to any external battery, car USB, laptop interface, charging adapters, etc. to power the baby bottle warmer. A great solution for parents to conveniently, safely and easily warm the baby bottle while traveling in the car. So your baby can drink warm milk at home, outdoors, or on the go! 3. 【Portable Baby Bottle Warmer】 Small and compact design for easy carrying and storage. The baby feeding bottle warmer has a strap design, so you can hang the milk warmer on the diaper bag belt or on the armrest of the stroller. The USB baby bottle thermostat can make feeding at night easier. Compared with traditional milk powder, the baby can't wait and the parents don't have enough sleep. This breast milk warmer only needs to press the switch to solve the problem of drinking and preparing at night! 4. 【Smart constant temperature maintenance】 This milk bottle warming bag is made of durable, safe and insulating materials. The baby can drink milk while heating. 47 °C circulating constant temperature heating, effectively maintaining nutritious milk. The baby feeding bottle warmer can maintain a warm temperature and prevent it from cooling. 5. 【Fits Various Sizes of Bottles】The portable USB baby bottle warmer has a loop design that can be adjusted in size to fit various types of baby bottles. The baby car bottle warmer can be used with plastic and glass bottles. The baby breast milk warmer has a non-slip strip inside to help secure the bottle in place so it doesn't fall out or slip during travel - even more peace of mind!