Never have frosty and foggy side mirrors with these Rearview Mirror Defogger Heating Sheets! It has a heating element that helps melt snow and frost, and a defogger element that helps clear rain and fog from your side mirrors! Matched with the heating plate, the auto-off module can automatically control the on and off time, which can ensure high-current heating, but also completely avoid the dry burning state, which greatly improves the safety of rainy driving. and snowy weather. The working mode of the auto-off module is as follows: power on for 10 minutes, turn off for 3 minutes, then turn on for 10 minutes, turn off for 3 minutes, and this reciprocal cycle. Ensure the heating element can work stably for a long time and prevent dry burning. Made from a versatile material that makes it easy to fit any shape and size side mirror! Works perfectly with almost all standard side mirrors. Use on any model car! OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.