Model Rate Current S.P.L. Power (mA) (Db/m) ( W) SC-606-320 (one tone) 320 105? 15 SC-606-600 (one tone) 600 108? 15 SC-606-600S (six tone) 600 108? 15 SC-606-1000 (one tone) 1000 115? 20 SC-606-1200S (six tone) 1200 115? 20 Material: ABS housing in Black Rated Voltage (VDC): 12 Operating (VDC): 6-15 Packing size (mm): 580*240*450