1.118 series 118Z-11 ong gang doorbell panel wall switch 2.ISO,NOM,CE,CCC 3.south american satandard 1.118 series 118Z-11 ong gang doorbell panel wall switch2.safety usage,reasonable price3.timely delivery,good service4.main markets:Middle East, North America,South Africa5.ISO,NOM,CE,CCCIVORY 118 series 118Z-11 ong gang doorbell panel wall switch