Soft and portable: the bottle warmer is made of leather, not easy to fall off. Can be applied to water cups, mineral water bottles, milk cartons, and other materials, can be hung on the stroller or crib USB Charging: The milk warmer comes with a USB cable. Just connect the cable to any mobile power source, such as a car USB or laptop port. Help you to heat milk anytime and anywhere Great Insulation: This milk warmer bag can keep food and drinks warm for a long time. It can also keep hot water cups from getting hot and easy to clean Durable and Safe: The milk bottle insulated bag is made of durable materials and is odorless. It has good shape retention, and higher strength and resilience Save Space: Can be unfolded and folded, saving space, and convenient for home storage. At the same time, it can be conveniently put in a backpack when traveling outdoors, which is convenient for outdoor use Specifications: Material: imitation leather and flannel Product size: about 30 x 13.5cm (unfolded) Applicable bottle size: 55mm-75mm/2.17-2.95in Voltage: 5V Power port: USB Temperature: High: 60C, Mid: 50C, Low: 40C Package included: 1 x Baby Bottle Warmer 1 x USB Cable Other items not included