CJB electronic siren series: Unique and scientific design, perfect for operation, safely and reliably. Beautiful performance become decoration with inner car that show very honour. It is suitable to various types cars. Design and produced in accordance with GB standard. Character: Digital technology and single molectron make, performance steady and reliable. Additional functions of two sets switched of light control in the panel. Design perfectly. Function: aux, yelp, hi-lo, wail-1,wail-2, siren, horn, super-siren. Yelp relay. Tool. Build in LID display, sound amplifying.