GPS Interface optical data interface via Infrared diode (NMEA 0183): New, flashing LED in GPS optical interface confirms data transmission from GPS; downloaded GPS coordinates confirmed by flashing LEDs within three seconds of completing self-test sequence Fastest means available of delivering GPS position Patented proprietary electronics package for faster, more stable 406 frequency transmission; full functional self-test including battery voltage and internal circuitry Field programmable at BRC equipped with FPR-100, FPR-10 Lanyard coil retained with all around cover for non-tangling deployment Universal usage illustrations; English and French languages Built-in strobe for enhanced location in poor visibility conditions Single, three-position switch for easy test and operation. Steady green LED indicates unit has passed full functional test, flashing red LED indicates unit is ON Transmits on 406 MHz (COSPAS-SARSAT) with your registered, digitally-coded distress signal, and 121.5 MHz (SAR homing frequency) Can be manually activated; self-buoyant no external float collar to lose Exclusive, polycarbonate blend designed for maximum resistance to UV and chemicals; maximum durability when exposed to extreme temperatures or shock 5-year limited warranty 5-year replacement life (11-year useful life) lithium battery Operating life 48 hours @ -40C (-40F) $599.95 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!