Today I lose my car key so I search on Internet for something to help me in similar situations. Smart Find is what I need. Cost a little to much but I think will help me to find the keys in a easy and funny way.
Smart Find locates your keys and other essentials with a loud, 85-decibel alarm. Simply press one of the color-coded pagers on your wireless transmitter, and the matching key ring or receiver will answer with a loud alarm from anywhere in your home. Transmits up to a 60-foot range through floors, walls?even sofa cushions. Includes two color-coded key rings and two slim, color-coded receivers (to attach to your PDA, wallet, etc.).