Electronic Siren (490-0488F) Specifications Faxback Doc. # 6596 Horn-Speaker....................ABS plastic, 5 1/4" (13 cm) diameter Power Rating:...................6 Watts nominal Impedance:......................8 ohms Operating Voltage:..............9-16.5 volts DC (12 volts nominal) Current Drain:..................550mA (max) Tone:...........................Rise-fall or steady (wiring selectable) Output Level:...................105+/-5 dBA at 1 meter (LB/all-07/11/94)