The 295HFSC9 is a self-contained dual siren capable of running two separate 100W siren speakers. It has selectable siren tones and includes the option for Whelen's version of the electronic "Q" siren as well as a removable microphone. 
 
Mounting: Bail bracket or L brackets (not included)
Wiring: 12V DC (wiring/ short harness included)
Condition: Good, bench tested/may have minor cosmetic imperfections