Power:15W Rated Voltage:DC 12V/24V Operate Voltage:DC 6-15V/18-28V Current:150mA-250mA Sound:1or6 tone SPL:108dB-115dB@one meter ABS Plastic Housing and Iron Bracket Package: Product meas:75x61x75mm 100pcs/ctn Carton size:400x400x245mm