ACR Aqualink 406 2882 Personal Locator Beacon Includes Internal GPS 5-Year Battery Belt Clip
http://www.amazon.com/gp/product/B003BQM058?tag=sukses2015-20
Includes internal GPS for quick position fix by Search and Rescue forces
406 MHz Satellite Search and Rescue transmitter and 1215 MHz Homing Beacon transmitter
Brilliant LED strobe light to assist rescuers in locating you
Size 225W x 588H x 149D
35 Hour transmit time and 5 year battery shelf life