... selectable 200m The Best Den fence is a Good OffenceThe HX-SL300S Wireless outdoor Siren is a fully supervised siren ... to enter the home, with its powerful 110db sounder, the HX-SL300S will annunciate unwanted entrance to property and premises. The ... also provides a visual warning and deterrent upon activation. The HX-SL300S distinguishes between burglars, fire, alarm by emitting different sounds ...