Feel The Noise Grab the attention of distracted motorists and pedestrians with the Feniex Hammer, an ultra-clear, low-frequency siren. The Hammer produces powerful sound waves to help emergency responders clear intersections quickly and safely. The Feniex Hammer features the latest in low-frequency technology: the all-in-one system includes a built-in siren, amplifier and speaker. The system receives siren tones, reduces them to 1/4 of the incoming frequency then replays them through the 6'' speaker. The result is powerfully clear and consistent dual-frequency outputs. This American-made product is built Texas-tough at our headquarters and manufacturing facility in Austin, Texas.