The Breitling Emergency watch was specifically designed for pilots and aircrews. It has a built-in micro-transmitter that broadcasts on the 121.5 MHz aircraft emergency frequency. If a crash or forced landing were to occur, the watch will emit a signal that can help rescuers locate the individual. This feature is meant to supplement the aircraft's own emergency signaling equipment. To activate the transmitter, simply unscrew the protective cap and pull out the antenna. It will send out a signal for 48 hours. In ideal conditions, the transmitter's signal can reach up to 160 kilometers (100 miles) if the search aircraft is flying at 6,000 m (about 20,000 feet).