Avoid direct contact with dirty surfaces such as touch screens and public buttons Reduce contact point to limit exposure to unclean conditions. The less it touches, the better it gets! The keychain or key can be easily transported to Compact and lightweight design will let you forget you have it up to the seconds you need! Crafted with premium copper alloy. Copper content of at least 60% 2 year Manufacturer Warranty: Changes within the first 2 years if any of your KeySmart products break under normal wear and tear., Weight: 0.03968320716 Pounds, Manufacturer: Curv Group