Ltpgtprotect your home without an expensive alarm system by using these 5 door or window sensors that sounds a loud siren when one is opened get yours for just pound900ltpgt ltpgtltstronggtincludesltstronggt ltul classquotbulletlistquotgt ltligteasy installation ltligt ltligtcomplete with mounting pads ltligt ltligtlr44 batteries includedltligt ltligtprotects doors amp windowsltligt ltligt105db instant alarmltlig