back up horn : 1> feature :DC-12V , 2>sound : I TONE 3>packing :each in color box or side blister back up horn :1> feature :DC-12V , 20W2>sound : I tone ,beebee/lanbada/music/baby crying/bird/macarena/english/arabic/russian3>packing :each in color box or side blister . 100 sets /ctn0.031 cbm 4>SIZE:73*73*85MM back up horn