What is an lrad and how do they work? The first LRADs were developed as military weapons in response to the bombing of the USS Cole off the coast of Yemen in 2000. Military officials asked the LRAD Corporation (now Genasys) for a device with two functions: to communicate at a distance with potential threats, and to disperse them with an unbearable alarm-like sound.What is the lrad 300x ra? The LRAD 300X-RA™ and LRAD 300X™ are a compact, lightweight solution for use on small vessels, CROWs and vehicle mounted armor. They can be easily transported to provide security personnel long range communications and a highly effective hailing and warning capability where needed.What is the range of lrlrad 500x? LRAD 500X™ produces a sound pattern that provides clear communication over long distances. The deterrent tone can reach a maximum of 149 dB (at one meter) to influence behavior or determine intent. *Highly intelligible speech transmissions over 2000 meters; max range of 650 meters over 88 dB of background noise.How does the lrad 360x work? The LRAD 360X broadcasts powerful emergency/warning siren sounds, multi-language messages and a near infinite variety of wildlife tones and predator calls in a 360° pattern over distances up to 2 miles. The LRAD 360X is modular enabling customization of the broadcast area footprint for mass notification systems and wildlife protection requirements.