2013 Newest~ Make Your Life Easier and More Efficient & up 50m Range & No Radiation & Low Battery Consumption & Battery Last for 6 Months & Easy to Use 5 in 1 Alarm Remote Wireless Key Things Lost Locator Finder Receiver Electronic RF wireless technology,no radiation Stable function,anti lost function Easy to secure the keys or other things Long battery last time and working distance The transmitter is designed as a remote control key, easy to carry and operate