This multi-feature siren alerts motorists and pedestrians with nine operational modes including the unique Intersection Mode. Select Tap, Radio Rebroadcast, Standby, Wail, or Yelp functions with the easy-to-use rotary switch. Three pushbutton momentary switches control the Air Horn, Phaser and Intersection features. Limit one-handed fumbling for controls while driving by adapting the Tap and Air Horn modes for vehicle horn ring.