Compact, easy to install, imported materials, reliable quality.welcome customers to consult Model No. QTY(PCS) G.W/N.W MEANS QTY(set) G.W/N.W MEANS Current Frequency Sound Level Voltage HD80C 50 10/11kg 47*24*24cm 30 12/13kg 47*21*38cm 2.5A 370Hz 105db 12V best seller disc horn