The Federal Signal Vitalite 121 is a compact, rotating light designed for vehicular applications. It features a parabolic reflector that rotates around an incandescent lamp, providing 60 flashes per minute in all directions. The 121 is available in five dome colors – amber, blue, clear, green and red.

The 121 comes with an integrated magnetic mount and steel mounting plate. Power is supplied to the 121 via a 10–foot electrical cord with a cigarette lighter type plug. The 121 is available in 12VDC.
The model 121 is UL Listed.