... 4. Power: 100W, 150W, 200W, 300W Police Car Siren:Police Car Siren HA911 Details:Item No.: HA911Voltage: 12V or 24VPower: ... fire fighting, rescuing, engineering, clearing the way, protocol, siren and aerial defiance etc. 2. Appearance of the main engine is elegant, steady, ... within 2 types according to different powers. 3. The police car siren can matche with warning lightbar, with 4 lighting channels ...