A-73BS SIZE:73L X 68W X 75.5H mm OPERATING VOLTAGE:6-15VDC RATED VOLTAGE:12VDC RATED POWER:20W SPL DB/1M:115±3 TONE:1 TONE OR 6 TONE DRIVER TYPE:NEODYMIUM MAGNET BATTERY: 65mA X 5PCS KEY TYPE:FLAT OR ROUND KEY