Specification: Material: cotton, spandex blend (Optional)Pattern: Donut Pattern / Cat Pattern / Rocket-Pattern / Rainbow-Pattern / Polar Bear-Pattern / Dinosaur-Pattern Instructions for use: Voltage 5V, current 1A to 2A. Ordinary mobile phone charger, computer USB interface, charging treasure, etc. can be used. Environmental instructions: no fluorescent agent Washing instructions: Take out the heat-generating components when washing. Size: Approx. 28cm * 13cm * 1cm Package list: 1 * Baby Bottle Warmer Cover 1 * Heating Part(Data cable and heater chip are welded together) Note: 1. Please allow slight error due to manual measurement. 2. Different monitor colors may be different. Thanks for your kind understanding. 1. Wonderful Material:Baby Bottle Warmer Cover is made of high-quality cotton and spandex blend material, which is safe and non-toxic. 2. Application:Milk Bottle Heater Cover is compatible with many kinds of 5V 2A USB devices such as power bank, laptop, charging adapter, etc. 3. Convenient and Practical:Warms baby milk to perfect temperature. 4. Portable and Light:Small and compact design for easy carry and storage. 5. Easy to Use:Perfect solution for parents to conveniently, safely and easily warm baby bottle while in the car traveling.