HRB-P80 Siren:DC12V,24V,AC110V,220V.CJB electronic siren series: Unique and scientific design, perfect for operation.... CJB electronic siren series: Unique and scientific design ... . Function: aux, yelp, hi-lo, wail-1,wail-2, siren, horn, super-siren. Yelp relay. Tool. Build in LID display, sound amplifying. HRB-P80 Siren