XA500 Siren 200W with PA, Air Horn for Police Fire EMS/EMT GETHRU TECHNOLOGY XA500 200W Siren Amp w/PA Air Horn (MADE IN USA) HANDS-FREE Operation. Single or Double press buttons to operate siren MANUAL SIREN: Peak and Hold with Coast Down (can be disabled) Clear PA, Horn Switch to wire Siren activation Speaker over current, fuse and polarity protected (1 year warranty)