Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you! Zero contact: In different situations, the non-contact door opener can avoid touching the dirty public touch screen, such as pressing the elevator button, pulling the door handle, etc. The perfect hook design can hook the door handle more firmly; the reasonable grip design makes it easier to grasp with the fingers; the slender design of the retractable key chain makes the key lighter and more convenient. It is made of zinc alloy called "antibacterial copper". The special material properties can inactivate bacteria. It has good corrosion resistance. Its deep layer and repeated electroplating make it difficult to fade. Safety and Hygiene-Maintain sterility by safely and effectively handling any shared surfaces. Use our unique non-contact tools to maintain better hygiene throughout the day! It can be easily stored in your wallet or pocket, and can even be connected to your keychain. It is very convenient to carry and operate at any time.