1. For warming up and adjusting glasses frames during processing. For normal plastic frames, they can be easily adjusted when the temperature reaches 70°C (158°F). As winter approaches and the weather becomes colder, we recommend using it indoors (working temperature above 77°F). 2. Note: If the heating temperature of the frame warmer is insufficient, try using the shade to concentrate the heat and extend its operation time. Additionally, the temperature can be adjusted between 122°F and 212°F using the temperature controller. 3. Some customers may wonder why this food warmer doesn't heat up quickly. If it heats up too fast or too much, it may damage or burn the surface of plastic frames. It heats up slowly to effectively protect plastic frames from damage or burns. Please be patient during the heating process. 4. The socket heater is designed for adjusting glasses frames, not for metal, resin, or plate frames. It softens the frame without causing damage, allowing for easy adjustment and . It is widely used in optical shops and the eyewear processing industry.