It can control the constant temperature and support the use of all models. It can be installed without the rearview mirror heating function. The upgrade of the rearview mirror heating does not need to break the wire. The installation is equipped with an switch. Power off system, 't worry about forgetting to turn it off However, car owners who refit their rearview mirror heating need to pay attention, because there is no temperature control device during the refitting process, so after the electric heating function is turned on, the heating sheet will always heat the lens. If the water droplets on the lens have dried up, then The lens is equal to the state of "dry burning", which will cause a series of problems, especially for cars equipped with high-power heating film, the consequences are more serious. If the state of thousand is light, the life of the heating film will be reduced and the power will be wasted. Universal intelligent rearview lens heating module Notice: It is necessary to purchase a heating plate to install at the position of the rearview mirror!!!! Material: ABS Color: As Shown Package Contents: 1 pcs x Mirror heating control module 1 x pack power cord Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.