This series of product is for overtaking Another vehicle, first press horn, and then radially soft light, these two operations happen in same time for sure over pass and security for each other. LIGHT AND SOUND WILL SEND OUT SIMULTANEOUSLY. BEAM HORN SERIES YL-2003 Diameter: 160mm SIZE : 670mm Enclosed herewith are three replacable mirrors PAT.NO.48386 ........................................................................................................................................................................................................ YP-2000 KAKU-DOUBLE-BEAM INTERCHANGABLE SOUND AND LIGHTING SIZE: 780 / 215 / 115mm 590 / 215 / 115mm PAT.NO.48386 YL-2002 Enclosed herwith are three replacable mirrors SIZE: (a)640mm (b)740mm PAT.NO.48386   ................................................................................................................................................................................................................ No. 16, Lane 132, sec. 3, Yung Ping Rd., Taiping City, Taichung Hsien, TAIWAN R.O.C. TEL: 886-4-2270-3006 ( FACTARY ) . 886-4- 2273-2852( OFFICE ) . FAX: 886-4-22706927 http://www.horn.com.tw . http://www.sesnc.com.tw/horn/hornos/