Federal Signal MS4000U Series Mini Siren

The MS4000U is designed for undercover police officers and volunteer firefighters. Siren functions are activated in the same manner as the standard MS4000, but the MS4000U mini-siren is activated with switches mounted on a small, remote switch panel.

• 100 W mini-siren for undercover and administrative vehicles
• Wail, Yelp, Air Horn, and Priority siren tones
• Compact and easy to operate
• Three-year warranty