Extremely loud 114dB piezo sounder High intensity xenon flashing strobe light Selectable SAB mode or SCB mode Built-in NiCad backup battery Battery: Rechargable 6V, 500mAh Adjustable sounder cut-off timer Flashing comfort LEDs Dual tamper switch protected Size: 310L X 182W X 78H mm Operating Voltage: 6-15VDC Rated Voltage: 12VDC Rated Current: 300mA moisture proof for PCB