1. High definition true glass convex wide-angle mirror 2. 3 inch ultra-thin and ultra-thin design, 3. Install and test within seconds 4. Essential for trucks, cars, SUVs, RVs, and trucks Installation method: 1. Clean the two outer mirrors first, it is recommended to clean them with alcohol. 2. Find the position, remove the adhesive cover from the pivot base, and apply pressure to stick it onto the rearview mirror for at least 15 seconds. Installation position: It can be placed almost anywhere, and it is recommended to place it on the upper and outer sides of both mirrors. How to remove (be careful when removing): 1. A hair dryer can help remove it. 2. If there is still adhesive after removal, nail polish remover or alcohol can remove the remaining adhesive. Attention: 1. Please firmly press this blind spot mirror onto the rearview mirror during installation to prevent it from falling off. 2. Please ensure that the blind spot rearview mirror does not exceed the edge of the car rearview mirror. This product is not suitable for motorcycles. 3. Please fold the rearview mirror when washing the car. It is not recommended to wash the car within 24 hours after installing blind lenses. 4. The rearview mirror is 3 inches, please check the size before placing an order