The FAST FIND's small size belies its rugged construction and powerful output. Once activated, the distress beacon will obtain a GPS position, send out a signal for help, and continue to transmit for at least 24 hours, at a powerful 5 watt output, ensuring that your call for help gets through whatever the conditions. The pocket sized beacon transmits at the press of a button, to alert search and rescue services to your plight. A built in strobe can be activated to automatically flash SOS to any response activity. The Fast Find weighs just 5.3 oz (150g) and measures D 34mm x W 47mm x L 106mm. It is extremely sturdy and designed to cope with temperatures as low as -20°. The Fast Find's battery is designed to run for a minimum of 24 hours at the end of 5 years after which it can be easily replaced.