The Federal Signal model L is a general purpose electro-mechanical siren that produces a distinctive sound and tonal quality for industrial applications. It has a low maximum pitch which provides excellent contrast to industrial ambient noise. Introduced in 1946, the model L is still used today in many rugged and extreme environments and applications. The model L features a universal motor and operates with 120 VAC/125 VDC. The model L is also available for 240 VAC/250 VDC operation. The fractional horsepower motor drives a ported aluminum rotor within the specially designed stator to produce a unique sound. The recommended duty cycle is five minutes on/five minutes off. This siren produces an attention-getting 112 dBA at 10 ft (122 dBA at 1 m).the model L's metal housing is sealed with red powder-coat for an attractive appearance and superior corrosion resistance. The swivel mount bracket accommodates wall and surface mount installations.