The Breitling Emergency is a watch designed for pilots and aircrews. It has a built-in micro-transmitter that operates on the 121.5 MHz aircraft emergency frequency. In case of an emergency, such as a crash or forced landing, the watch will emit a signal that can help rescuers locate the wearer. This makes it a valuable companion to an aircraft's own distress signaling equipment. To activate the transmitter, you simply unscrew the protective cap and pull out the antenna. The signal can reach up to 160 kilometers (100 miles) if the search aircraft is flying at 6,000 meters (about 20,000 feet).