ELK Products 30 Watt Siren Dual Tone Indoor/Outdoor Siren 6-12VDC 1.1Ah 120db 6 X 8 X 9.5 Inch ELK Products 30 Watt Siren Dual Tone Indoor/Outdoor Siren 6-12VDC 1.1Ah 120db 6 X 8 X 9.5 Inch