Features: High-Quality Material: Made of high-quality material, not easy to damage, can be used for a long time and durable. Automatic heat preservation: After the baby bottle heaters reaches the set temperature, it automatically stops heating and enters the heat preservation mode. It is also equipped with a display screen that can display the baby39;s milk temperature in real time. Portable Bottle Warmer: Convenient and compact design makes the bottle warmer easy to carry when hiking, shopping and traveling. Warmth preservation function: The baby can drink warm milk at any time. It has 7 adjustables levels, constants temperature and warmth, and is easy to use. Convenient USB charging: USB power supply, can be connected to mobile power supply, charging head, car USB, etc., convenient and fast. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: PU, polyester fiber, PET, alloy heating film Size: diameter 50-80mm*120mm Rated voltage: 5V Rated current: 2A Rated input power: 10W Suitable diameter bottles: 50mm-80mm Instructions: 1. Put the baby bottle into the thermal cover, adjust the sticker according to the diameter of the baby bottle, and connect the power supply. 2. After connecting to the power supply, the power light turns on, the connection is normal, and the default temperature is 35 degrees. 3. Press and hold the button to start temperature adjustment. There are 7 levels available for adjustment 35°C, 40°C, 45°C, 50°C, 55°C, 60°C, 65°C 4. After selecting the gear, the display will jumps to the current temperature and start working. 5. After reaching the preset temperature, the temperature display will show the preset temperature and enter the heat preservation mode. Kind tips: 1. When the temperature is lower than the set temperature, it is in the heating state, and the display will change the value according to the current temperature. 2. When the temperature reaches the set temperature, heating ends and it enters the heat preservation state, and the display screen displays the set heat preservation temperature. 3. When the temperature is higher than the set temperature, the display screen displays the real-time monitoring temperature. 4. It is recommended to use this product in an environment of 0°C40°C. The lower the ambient temperature, the longer the heating time. 5. Low-temperature heating is limited by power and cannot be achieved in the current state. 6. It takes about 20-30 minutes to heat 200ml of water from 25°C to 45°C. 7. The heating time is long, so it is recommended to heat it in advances or use it to keep warm. 8. The minimum diameter of the feeding bottle shall not be less than 50mm, and the maximum diameter shall not be greater than 80mm. Package List: 1 x Bottle Heaters Cover