... ,Cage protection is optional to add APPLICATIONS: Easy spot alarm for outdoor field, home, farm, business store, public plaza security, residential ... 9. Stand pack: one wireless siren with strobe light(backup li-ion battery optional), an adaptor(or UPS backup adaptor), one door ... code correspond with alarm host.D0~D3 is data code for setting different zone. Note: H=1, L=2, Empty =0 ...