Internal GPS engine allows faster 406 EPIRB location than standard, non-GPS-enabled models; can update position every 20 minutes New GPS engine provides faster acquisition time EPIRB has Circuitry, Battery Voltage and GPS Acquisition Test features built in, or can be fully tested at a BRC (See Glossary-Full Functional Self-Test) Patented proprietary electronics package for faster, more stable 406 frequency transmission Field Programmable at BRC equipped with FPR-100, FPR-10 48 hours operating life at -40C (-40F), allowing for monthly self-test for 5 years Lanyard coil retained with all around cover for non-tangling deployment Universal usage illustrations; English and French languages Mounting Bracket included with EPIRB purchase Transmits on 406 MHz (COSPAS-SARSAT) with your registered, unique, digitally-coded distress signal, and 121.5 MHz (SAR homing frequency) Built-in strobe for enhanced location in poor visibility conditions Single, three-position switch for easy test of battery, EPIRB and GPS operation. Steady green LED indicates unit has passed full functional EPIRB test. Flashing red LED indicates unit is "ON" Can be manually activated; self-buoyant - no external float collar to lose High impact plastic case designed to withstand exposure to UV rays, oil, sea water and raft packing 5-year limited warranty 5-year replacement life lithium battery $799.00 Please call 1-908-642-8579 or e-mail us at NCTackle@aol.com with any questions. Thank you for shopping with us! FREE SHIPPING ON ORDERS OVER $250!