Bullet Points: 1Smart 4 Levels Available: 60 minutes, 45 minutes, 30 minutes, and constant heating from time to time. 23 Levels of Temperature Control: High: 50-55, middle: 45-50, low: 40-45. 3Heating Film with Multiple Uses: Unlocking multiple uses, it can be used as a body warmer and a wrist warmer. When using it as a body warmer or a wrist warmer, please use the 5V2A power supply and do not use it directly in contact with the skin. 4Timed Power-off Security Guarantee: 1. Double power-off system automatic temperature control, chip temperature control and power-off, there is an intelligent temperature control chip on the heating chip, and the power will be automatically power-off when the temperature is too high; 2. The timing power-off is more convenient to use. 5Warm Tip: This product needs to match the 5V 2A power supply, lower or higher than 2A may cause no heat. Description: Our USB Baby Bottle Warmer has 4 smart levels available, 60 minutes, 45 minutes, 30 minutes, and constant heating from time to time. Specification: Name: USB Baby Bottle Heater Packing List: Warmer*1 Insulation Cloth Layer*1 A: Polar bear on green background B: Dinosaur C: Car traffic lights D: Kitty Notes: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.