Key Finding Keyrings - Locate your lost keys effectively. Just clap your hand to trigger your keyfinder wirelessly. Keyfinder receivingclapping sound signal will sound "WOOF" "WOOF" and LED will light up. Design protected by Area Plus Ltd. Email us at area@areaplus.com.hk http://areaplus.internetformarketing.net/Key-Finding-Keyrings.html